Load Specifications
Bullet Manufacturer:Peregrine
Bullet Weight:220 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 Rem. Ultra Mag. load data
Case Length (l3):2.76"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:110 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:11.0
Load data in caliber .338 Rem. Ultra Mag. with .338 | 220gr | Peregrine Glider (Glider GRM) bullet and 198 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country and Alliant Reloder-17.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 54,969 psi | 86% | 2631 fps | 100% |
| Accurate 2495 | <<locked>> | 82% | 55,259 psi | 87% | 2635 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,898 psi | 89% | 2710 fps | 99.3% |
| Accurate 2700 | <<locked>> | 84% | 57,116 psi | 90% | 2713 fps | 99.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,926 psi | 86% | 2746 fps | 99.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,114 psi | 86% | 2749 fps | 99.9% |
| Accurate 4064 | <<locked>> | 84% | 55,608 psi | 87% | 2687 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 55,883 psi | 88% | 2690 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,087 psi | 89% | 2795 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,305 psi | 90% | 2799 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 56,449 psi | 88% | 2890 fps | 98.3% |
| Accurate High Country | <<locked>> | 98% | 56,869 psi | 89% | 2897 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 98% | 53,679 psi | 84% | 2831 fps | 96.6% |
| Accurate MAGPRO | <<locked>> | 98% | 53,853 psi | 84% | 2835 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 86% | 56,086 psi | 88% | 2723 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 56,304 psi | 88% | 2730 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,447 psi | 85% | 2789 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 96% | 54,824 psi | 86% | 2795 fps | 98.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,898 psi | 88% | 2838 fps | 97.9% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,275 psi | 88% | 2848 fps | 98% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,637 psi | 87% | 2841 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,869 psi | 88% | 2844 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 54,665 psi | 86% | 2785 fps | 98.6% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 54,665 psi | 86% | 2785 fps | 98.6% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 54,868 psi | 86% | 2792 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,971 psi | 89% | 2743 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,985 psi | 89% | 2746 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,000 psi | 89% | 2766 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,232 psi | 90% | 2769 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,215 psi | 85% | 2802 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,433 psi | 85% | 2805 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,535 psi | 87% | 2818 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,753 psi | 87% | 2825 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,595 psi | 90% | 2831 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,725 psi | 90% | 2835 fps | 99.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,824 psi | 86% | 2831 fps | 98.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,259 psi | 87% | 2838 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,706 psi | 81% | 2762 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,098 psi | 82% | 2769 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,831 psi | 70% | 2697 fps | 99.6% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,150 psi | 71% | 2703 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,043 psi | 88% | 2900 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,202 psi | 88% | 2904 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,241 psi | 79% | 2759 fps | 98% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 2762 fps | 98.1% |
| Bofors RP3 | <<locked>> | 86% | 57,682 psi | 90% | 2756 fps | 100% |
| Bofors RP3 | <<locked>> | 84% | 54,230 psi | 85% | 2713 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,824 psi | 86% | 2831 fps | 98.9% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,259 psi | 87% | 2838 fps | 98.9% |
| Bofors RP7 | <<locked>> | 90% | 57,029 psi | 89% | 2746 fps | 99.4% |
| Bofors RP7 | <<locked>> | 90% | 57,450 psi | 90% | 2756 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 44,556 psi | 70% | 2635 fps | 96% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 44,831 psi | 70% | 2641 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 84% | 54,491 psi | 85% | 2726 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 54,708 psi | 86% | 2733 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,666 psi | 87% | 2799 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 90% | 55,854 psi | 88% | 2802 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 88% | 55,347 psi | 87% | 2759 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 88% | 55,535 psi | 87% | 2762 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 98% | 55,999 psi | 88% | 2782 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 98% | 56,391 psi | 88% | 2789 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,853 psi | 86% | 2766 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,027 psi | 86% | 2772 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,621 psi | 86% | 2726 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,824 psi | 86% | 2730 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,014 psi | 88% | 2759 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,246 psi | 88% | 2766 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,990 psi | 69% | 2733 fps | 97.5% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,121 psi | 69% | 2736 fps | 97.6% |
| Hodgdon Superformance | <<locked>> | 90% | 56,115 psi | 88% | 2831 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 90% | 56,492 psi | 89% | 2838 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,245 psi | 57% | 1713 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,405 psi | 57% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,449 psi | 88% | 2726 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,681 psi | 89% | 2730 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,405 psi | 87% | 2707 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,622 psi | 87% | 2710 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,520 psi | 85% | 2690 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,723 psi | 86% | 2694 fps | 99.5% |
| IMR 4350 | <<locked>> | 92% | 54,708 psi | 86% | 2730 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 55,085 psi | 86% | 2736 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,463 psi | 87% | 2726 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,651 psi | 87% | 2730 fps | 99.5% |
| IMR 4831 | <<locked>> | 94% | 57,348 psi | 90% | 2782 fps | 100% |
| IMR 4831 | <<locked>> | 92% | 54,099 psi | 85% | 2740 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,853 psi | 86% | 2740 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,100 psi | 86% | 2746 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,450 psi | 90% | 2772 fps | 97.6% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,259 psi | 85% | 2726 fps | 97.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,359 psi | 84% | 2812 fps | 97.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,476 psi | 84% | 2815 fps | 97.6% |
| Lovex S060 | <<locked>> | 82% | 56,855 psi | 89% | 2690 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 57,101 psi | 89% | 2694 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,579 psi | 87% | 2697 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,825 psi | 87% | 2703 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,347 psi | 87% | 2720 fps | 99.9% |
| Lovex S065 | <<locked>> | 90% | 55,535 psi | 87% | 2723 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 56,710 psi | 89% | 2762 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 56,884 psi | 89% | 2766 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,469 psi | 71% | 2608 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,629 psi | 72% | 2608 fps | 99.1% |
| Norma 201 | <<locked>> | 82% | 56,753 psi | 89% | 2707 fps | 100% |
| Norma 201 | <<locked>> | 82% | 57,000 psi | 89% | 2710 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,667 psi | 90% | 2703 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,289 psi | 88% | 2749 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,521 psi | 89% | 2756 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,608 psi | 87% | 2782 fps | 98.6% |
| Norma 204 | <<locked>> | 92% | 55,999 psi | 88% | 2789 fps | 98.7% |
| Norma MRP | <<locked>> | 98% | 54,476 psi | 85% | 2858 fps | 99.6% |
| Norma MRP | <<locked>> | 98% | 54,911 psi | 86% | 2864 fps | 99.7% |
| Norma URP | <<locked>> | 92% | 55,651 psi | 87% | 2782 fps | 100% |
| Norma URP | <<locked>> | 92% | 55,898 psi | 88% | 2785 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,435 psi | 90% | 2776 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,653 psi | 90% | 2779 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,795 psi | 84% | 2825 fps | 97.9% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,983 psi | 85% | 2831 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 54,520 psi | 85% | 2782 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 92% | 54,940 psi | 86% | 2789 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,834 psi | 75% | 2703 fps | 98.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,196 psi | 76% | 2710 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,956 psi | 58% | 1755 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,941 psi | 58% | 1755 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,404 psi | 85% | 2710 fps | 99.7% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,650 psi | 86% | 2717 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,911 psi | 86% | 2812 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,390 psi | 87% | 2818 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 57,072 psi | 89% | 2818 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 57,493 psi | 90% | 2825 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,680 psi | 87% | 2848 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,869 psi | 88% | 2851 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,990 psi | 69% | 2723 fps | 98.5% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,295 psi | 69% | 2733 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 84% | 57,551 psi | 90% | 2707 fps | 100% |
| Rottweil R 902 | <<locked>> | 82% | 54,186 psi | 85% | 2664 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,273 psi | 85% | 2707 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,288 psi | 85% | 2707 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,130 psi | 88% | 2759 fps | 97.9% |
| Rottweil R 904 | <<locked>> | 96% | 56,507 psi | 89% | 2766 fps | 98% |
| Rottweil R 905 | <<locked>> | 98% | 56,666 psi | 89% | 2815 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 57,058 psi | 89% | 2822 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 90% | 57,029 psi | 89% | 2746 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 90% | 57,450 psi | 90% | 2756 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,347 psi | 87% | 2720 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,535 psi | 87% | 2723 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 55,579 psi | 87% | 2697 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 55,825 psi | 87% | 2703 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,710 psi | 89% | 2762 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 92% | 56,884 psi | 89% | 2766 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,912 psi | 88% | 2762 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,376 psi | 88% | 2769 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,811 psi | 89% | 2740 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,029 psi | 89% | 2743 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,551 psi | 90% | 2638 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,332 psi | 87% | 2598 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,361 psi | 87% | 2598 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,998 psi | 86% | 2674 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,158 psi | 86% | 2680 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,173 psi | 88% | 2812 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,579 psi | 89% | 2818 fps | 99% |
| Somchem S335 | <<locked>> | 82% | 57,246 psi | 90% | 2635 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 57,464 psi | 90% | 2638 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,667 psi | 90% | 2749 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 54,273 psi | 85% | 2703 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,331 psi | 85% | 2700 fps | 96.9% |
| Somchem S361 | <<locked>> | 94% | 54,650 psi | 86% | 2707 fps | 97% |
| Somchem S365 | <<locked>> | 94% | 55,085 psi | 86% | 2779 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 55,564 psi | 87% | 2785 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,363 psi | 90% | 2792 fps | 99.5% |
| Somchem S385 | <<locked>> | 98% | 57,522 psi | 90% | 2795 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 82% | 54,375 psi | 85% | 2621 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 54,621 psi | 86% | 2625 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,810 psi | 86% | 2638 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,056 psi | 86% | 2641 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,492 psi | 87% | 2677 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,695 psi | 87% | 2680 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,273 psi | 85% | 2726 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,491 psi | 85% | 2730 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,084 psi | 83% | 2713 fps | 98.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,229 psi | 83% | 2720 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 84% | 56,507 psi | 89% | 2677 fps | 100% |
| Vihtavuori N540 | <<locked>> | 84% | 56,710 psi | 89% | 2680 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,014 psi | 89% | 2782 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,188 psi | 90% | 2782 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 53,983 psi | 85% | 2785 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,447 psi | 85% | 2792 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,781 psi | 86% | 2848 fps | 97.4% |
| Vihtavuori N560 | <<locked>> | 98% | 55,143 psi | 86% | 2854 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 46,876 psi | 73% | 2707 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,911 psi | 84% | 2690 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,099 psi | 85% | 2694 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,666 psi | 87% | 2799 fps | 99.7% |
| Winchester 760 | <<locked>> | 90% | 56,086 psi | 88% | 2805 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,152 psi | 74% | 2825 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,413 psi | 74% | 2828 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,043 psi | 89% | 2743 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,261 psi | 90% | 2749 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,896 psi | 84% | 2733 fps | 98.5% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,041 psi | 85% | 2736 fps | 98.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 51,372 psi | 81% | 2585 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 51,677 psi | 81% | 2589 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,690 psi | 78% | 2602 fps | 98.4% |
| Accurate 2700 | <<locked>> | 80% | 49,879 psi | 78% | 2608 fps | 98.4% |
| Accurate 3100 | <<locked>> | 84% | 31,212 psi | 49% | 2323 fps | 95% |
| Accurate 3100 | <<locked>> | 84% | 31,357 psi | 49% | 2326 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 48,733 psi | 76% | 2592 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 49,008 psi | 77% | 2598 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,217 psi | 58% | 2470 fps | 98.6% |
| Accurate 4350 | <<locked>> | 80% | 37,463 psi | 59% | 2477 fps | 98.7% |
| Accurate High Country | 78.6 gr | 90% | 42,351 psi | 66% | 2651 fps | 95% |
| Accurate High Country | 80.4 gr | 90% | 42,511 psi | 67% | 2654 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 96% | 49,705 psi | 78% | 2769 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 96% | 50,067 psi | 78% | 2776 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 46,398 psi | 73% | 2579 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 46,601 psi | 73% | 2585 fps | 100% |
| ADI AR 2209 | <<locked>> | 88% | 41,611 psi | 65% | 2566 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 88% | 41,945 psi | 66% | 2575 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 94% | 45,440 psi | 71% | 2664 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 94% | 45,759 psi | 72% | 2671 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,793 psi | 81% | 2785 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,025 psi | 82% | 2789 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 41,901 psi | 66% | 2569 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 41,901 psi | 66% | 2569 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 39,218 psi | 61% | 2516 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,876 psi | 73% | 2598 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,094 psi | 74% | 2605 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,082 psi | 78% | 2667 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,328 psi | 79% | 2671 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,564 psi | 57% | 2490 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,622 psi | 57% | 2490 fps | 98.8% |
| Alliant Reloder-17 | 71.9 gr | 80% | 41,640 psi | 65% | 2605 fps | 100% |
| Alliant Reloder-17 | 71.9 gr | 80% | 41,858 psi | 66% | 2612 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,437 psi | 65% | 2562 fps | 95.8% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,611 psi | 65% | 2566 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 38,914 psi | 61% | 2552 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,073 psi | 61% | 2556 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,440 psi | 41% | 2247 fps | 96.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,614 psi | 42% | 2254 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,242 psi | 51% | 2418 fps | 96.1% |
| Alliant Reloder-25 | <<locked>> | 88% | 30,472 psi | 48% | 2369 fps | 95.1% |
| Alliant Reloder-26 | 75.5 gr | 82% | 30,501 psi | 48% | 2411 fps | 96.2% |
| Alliant Reloder-26 | 73.6 gr | 80% | 28,427 psi | 45% | 2352 fps | 95% |
| Bofors RP15 | <<locked>> | 94% | 41,046 psi | 64% | 2595 fps | 95.7% |
| Bofors RP15 | <<locked>> | 94% | 41,205 psi | 65% | 2598 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 47,195 psi | 74% | 2612 fps | 100% |
| Bofors RP3 | <<locked>> | 80% | 47,442 psi | 74% | 2615 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 38,914 psi | 61% | 2552 fps | 95.1% |
| Bofors RP5 | <<locked>> | 90% | 39,073 psi | 61% | 2556 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 41,481 psi | 65% | 2493 fps | 96.8% |
| Bofors RP7 | <<locked>> | 80% | 41,524 psi | 65% | 2497 fps | 96.9% |
| Hodgdon H1000 | <<locked>> | 98% | 41,597 psi | 65% | 2579 fps | 95% |
| Hodgdon H1000 | <<locked>> | 98% | 41,727 psi | 65% | 2582 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 47,587 psi | 75% | 2625 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 80% | 47,776 psi | 75% | 2625 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 39,479 psi | 62% | 2523 fps | 96.9% |
| Hodgdon H414 | <<locked>> | 80% | 39,653 psi | 62% | 2526 fps | 97% |
| Hodgdon H4350 | <<locked>> | 80% | 42,496 psi | 67% | 2543 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 42,714 psi | 67% | 2549 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 94% | 48,863 psi | 77% | 2674 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 94% | 49,008 psi | 77% | 2677 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 47,688 psi | 75% | 2654 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,066 psi | 75% | 2661 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,953 psi | 53% | 2382 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,185 psi | 54% | 2388 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,257 psi | 82% | 2710 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,504 psi | 82% | 2713 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 38,392 psi | 60% | 2605 fps | 95.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 38,696 psi | 61% | 2615 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 38,435 psi | 60% | 2530 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 80% | 38,754 psi | 61% | 2536 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,079 psi | 42% | 1535 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 42% | 1535 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,910 psi | 83% | 2677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,156 psi | 83% | 2680 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,762 psi | 76% | 2608 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,023 psi | 77% | 2615 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,169 psi | 80% | 2641 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,387 psi | 81% | 2644 fps | 99.1% |
| IMR 4350 | <<locked>> | 80% | 37,231 psi | 58% | 2425 fps | 95.5% |
| IMR 4350 | <<locked>> | 80% | 37,275 psi | 58% | 2425 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,975 psi | 67% | 2523 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,163 psi | 68% | 2526 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 35,940 psi | 56% | 2431 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 36,158 psi | 57% | 2438 fps | 98.5% |
| IMR 4895 | <<locked>> | 80% | 51,372 psi | 81% | 2694 fps | 100% |
| IMR 4895 | <<locked>> | 80% | 51,634 psi | 81% | 2697 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,413 psi | 74% | 2615 fps | 95.5% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,747 psi | 75% | 2621 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 96% | 46,369 psi | 73% | 2694 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 94% | 43,642 psi | 68% | 2641 fps | 95% |
| Lovex S060 | <<locked>> | 80% | 53,563 psi | 84% | 2644 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 53,621 psi | 84% | 2648 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,023 psi | 77% | 2605 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,052 psi | 77% | 2608 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,248 psi | 63% | 2470 fps | 98.2% |
| Lovex S065 | <<locked>> | 80% | 40,451 psi | 63% | 2477 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 38,566 psi | 60% | 2454 fps | 96.8% |
| Lovex S070 | <<locked>> | 80% | 38,754 psi | 61% | 2461 fps | 96.9% |
| Lovex S071 | <<locked>> | 90% | 32,532 psi | 51% | 2352 fps | 95.6% |
| Lovex S071 | <<locked>> | 90% | 32,706 psi | 51% | 2356 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 53,185 psi | 83% | 2657 fps | 100% |
| Norma 201 | <<locked>> | 80% | 53,447 psi | 84% | 2664 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,056 psi | 85% | 2657 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,429 psi | 77% | 2654 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,647 psi | 78% | 2657 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,192 psi | 66% | 2559 fps | 95.8% |
| Norma 204 | <<locked>> | 84% | 42,366 psi | 66% | 2562 fps | 95.9% |
| Norma MRP | <<locked>> | 86% | 35,404 psi | 55% | 2503 fps | 95.4% |
| Norma MRP | <<locked>> | 86% | 35,708 psi | 56% | 2510 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 37,275 psi | 58% | 2474 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 37,463 psi | 59% | 2477 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 50,067 psi | 78% | 2674 fps | 100% |
| Ramshot Big Game | <<locked>> | 80% | 50,285 psi | 79% | 2680 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 43,178 psi | 68% | 2641 fps | 95.2% |
| Ramshot Grand | <<locked>> | 94% | 43,323 psi | 68% | 2648 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 36,216 psi | 57% | 2461 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 80% | 36,260 psi | 57% | 2461 fps | 96.8% |
| Ramshot Magnum | <<locked>> | 94% | 38,189 psi | 60% | 2520 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 94% | 38,479 psi | 60% | 2530 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,470 psi | 43% | 1568 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,499 psi | 43% | 1572 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,732 psi | 75% | 2608 fps | 99% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,935 psi | 75% | 2612 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,324 psi | 69% | 2657 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,556 psi | 70% | 2661 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,217 psi | 58% | 2490 fps | 98.4% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,420 psi | 59% | 2497 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,245 psi | 57% | 2500 fps | 97.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,390 psi | 57% | 2507 fps | 98% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 35,404 psi | 55% | 2526 fps | 95.2% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 35,520 psi | 56% | 2530 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 50,734 psi | 80% | 2615 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 50,981 psi | 80% | 2621 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,353 psi | 70% | 2559 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,556 psi | 70% | 2562 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,224 psi | 72% | 2602 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 88% | 43,453 psi | 68% | 2552 fps | 95% |
| Rottweil R 905 | <<locked>> | 88% | 40,379 psi | 63% | 2546 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 88% | 40,567 psi | 64% | 2549 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 41,481 psi | 65% | 2493 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 80% | 41,524 psi | 65% | 2497 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,248 psi | 63% | 2470 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,451 psi | 63% | 2477 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 49,023 psi | 77% | 2605 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 49,052 psi | 77% | 2608 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,566 psi | 60% | 2454 fps | 96.8% |
| Shooters World SW4350 | <<locked>> | 80% | 38,754 psi | 61% | 2461 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,803 psi | 72% | 2615 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,847 psi | 72% | 2615 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,301 psi | 84% | 2690 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,345 psi | 84% | 2690 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,056 psi | 85% | 2595 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,701 psi | 72% | 2470 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,948 psi | 72% | 2474 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,494 psi | 62% | 2421 fps | 96.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,697 psi | 62% | 2425 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,016 psi | 63% | 2539 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,190 psi | 63% | 2543 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 53,737 psi | 84% | 2592 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 53,969 psi | 85% | 2595 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,614 psi | 70% | 2559 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,817 psi | 70% | 2562 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 47,485 psi | 74% | 2592 fps | 95.3% |
| Somchem S361 | <<locked>> | 90% | 47,601 psi | 75% | 2595 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 33,721 psi | 53% | 2431 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 33,779 psi | 53% | 2431 fps | 99.9% |
| Somchem S385 | <<locked>> | 86% | 38,203 psi | 60% | 2470 fps | 95.9% |
| Somchem S385 | <<locked>> | 84% | 35,897 psi | 56% | 2425 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 51,010 psi | 80% | 2579 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,285 psi | 80% | 2582 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,387 psi | 81% | 2595 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,605 psi | 81% | 2598 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,728 psi | 67% | 2493 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,931 psi | 67% | 2497 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,638 psi | 61% | 2470 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 80% | 38,812 psi | 61% | 2474 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 37,811 psi | 59% | 2454 fps | 95.3% |
| Vihtavuori N165 | <<locked>> | 90% | 37,956 psi | 59% | 2457 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 49,603 psi | 78% | 2589 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 49,821 psi | 78% | 2592 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,087 psi | 60% | 2470 fps | 98.5% |
| Vihtavuori N550 | <<locked>> | 80% | 38,290 psi | 60% | 2477 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 29,196 psi | 46% | 2320 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 80% | 29,414 psi | 46% | 2326 fps | 96.8% |
| Vihtavuori N560 | <<locked>> | 94% | 47,674 psi | 75% | 2730 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 94% | 47,834 psi | 75% | 2736 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 98% | 43,598 psi | 68% | 2648 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,869 psi | 59% | 2441 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,029 psi | 60% | 2444 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 39,610 psi | 62% | 2526 fps | 96.9% |
| Winchester 760 | <<locked>> | 80% | 39,813 psi | 62% | 2530 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,322 psi | 37% | 2211 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,366 psi | 37% | 2215 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,287 psi | 84% | 2694 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,505 psi | 84% | 2697 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,451 psi | 63% | 2510 fps | 95.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,596 psi | 64% | 2516 fps | 95.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 198 powders for .338 Rem. Ultra Mag. loaded with the .338 | 220gr | Peregrine Glider (Glider GRM). Alliant Reloder-26 delivers the highest muzzle velocity at 2,904 fps; across all powders the maximum-charge window runs from 1,713 fps to 2,904 fps. Accurate 3100 gives the best case fill at 100 %, and 198 of the 198 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.338" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 3100, ADI AR 2213 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Reloder-26, Accurate High Country, Alliant Reloder-17 rank at the top here: for .338 Rem. Ultra Mag. with the .338 | 220gr | Peregrine Glider (Glider GRM) they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.