Load Specifications
Bullet:.308 | 165gr | Barnes X S
Bullet Manufacturer:Barnes
Bullet Weight:165 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Case Length (l3):2.003"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:74 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:12.5
Load data in caliber .300 Rem. SA Ultra Mag. with .308 | 165gr | Barnes X S bullet and 99 powders. The key underlying parameters are shown in the table above.
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 2015 | <<locked>> | 84% | 56,681 psi | 87% | 2746 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 56,710 psi | 87% | 2782 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 56,942 psi | 88% | 2835 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 57,566 psi | 89% | 2812 fps | 97% |
| Accurate 4064 | <<locked>> | 90% | 56,130 psi | 86% | 2825 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 58,479 psi | 90% | 2949 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 88% | 58,740 psi | 90% | 2894 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 56,159 psi | 86% | 2838 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 57,580 psi | 89% | 2841 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 58,653 psi | 90% | 2815 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 58,233 psi | 90% | 3012 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,362 psi | 87% | 2864 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,971 psi | 88% | 2887 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,448 psi | 85% | 2943 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,855 psi | 87% | 2986 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,698 psi | 63% | 2697 fps | 98.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,991 psi | 69% | 2844 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 58,508 psi | 90% | 2907 fps | 99.7% |
| Bofors RP3 | <<locked>> | 92% | 57,508 psi | 88% | 2887 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 57,029 psi | 88% | 2844 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,115 psi | 86% | 2779 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 57,203 psi | 88% | 2874 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,172 psi | 85% | 2917 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 82% | 58,334 psi | 90% | 2835 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 58,189 psi | 90% | 2894 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 98% | 57,203 psi | 88% | 2940 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 96% | 57,798 psi | 89% | 2900 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 86% | 55,956 psi | 86% | 2854 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,808 psi | 80% | 2822 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 58,624 psi | 90% | 2936 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 58,001 psi | 89% | 2976 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,013 psi | 55% | 1732 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,724 psi | 87% | 2851 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,912 psi | 86% | 2838 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,680 psi | 86% | 2822 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,593 psi | 86% | 2799 fps | 97.4% |
| IMR 4198 | <<locked>> | 82% | 58,581 psi | 90% | 2740 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,724 psi | 87% | 2864 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 96% | 58,610 psi | 90% | 2874 fps | 97.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,172 psi | 85% | 2884 fps | 99.5% |
| IMR 4895 | <<locked>> | 90% | 58,349 psi | 90% | 2917 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 57,580 psi | 89% | 2841 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 58,813 psi | 90% | 2835 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,680 psi | 86% | 2825 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 58,044 psi | 89% | 2815 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 55,912 psi | 86% | 2825 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 58,392 psi | 90% | 2871 fps | 98.9% |
| Lovex S070 | <<locked>> | 98% | 55,912 psi | 86% | 2858 fps | 97.8% |
| Norma 201 | <<locked>> | 88% | 58,117 psi | 89% | 2841 fps | 100% |
| Norma 202 | <<locked>> | 88% | 58,015 psi | 89% | 2838 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,202 psi | 86% | 2874 fps | 99.9% |
| Norma 204ᴾ | <<locked>> | 100% | 57,595 psi | 89% | 2917 fps | 95.9% |
| Norma URPᴾ | <<locked>> | 100% | 56,855 psi | 87% | 2930 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 90% | 56,405 psi | 87% | 2897 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,666 psi | 86% | 2927 fps | 98.4% |
| Ramshot TAC | <<locked>> | 86% | 57,914 psi | 89% | 2861 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 86% | 57,508 psi | 88% | 2881 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 58,624 psi | 90% | 2844 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,608 psi | 56% | 1775 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 57,130 psi | 88% | 2822 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 58,218 psi | 90% | 2871 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 57,276 psi | 88% | 2953 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,507 psi | 87% | 2986 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 57,667 psi | 89% | 2966 fps | 99.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 57,101 psi | 88% | 2989 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 84% | 56,188 psi | 86% | 2779 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 58,552 psi | 90% | 2841 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,334 psi | 88% | 2877 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 57,029 psi | 88% | 2844 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 58,392 psi | 90% | 2871 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,680 psi | 86% | 2825 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,912 psi | 86% | 2825 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,912 psi | 86% | 2858 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 58,262 psi | 90% | 2930 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,739 psi | 87% | 2841 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,971 psi | 88% | 2864 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,666 psi | 86% | 2730 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,608 psi | 86% | 2726 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,361 psi | 85% | 2776 fps | 97.4% |
| Somchem S321 | <<locked>> | 82% | 55,492 psi | 85% | 2825 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 58,653 psi | 90% | 2776 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,999 psi | 86% | 2831 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 57,406 psi | 88% | 2871 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,358 psi | 79% | 2884 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 58,769 psi | 90% | 2733 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,695 psi | 86% | 2713 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 58,044 psi | 89% | 2802 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 58,508 psi | 90% | 2815 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 58,465 psi | 90% | 2844 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,057 psi | 86% | 2874 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 86% | 58,392 psi | 90% | 2844 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,884 psi | 88% | 2815 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 58,508 psi | 90% | 2930 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,367 psi | 68% | 2772 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 56,086 psi | 86% | 2851 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 58,146 psi | 89% | 2890 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 57,203 psi | 88% | 2940 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,709 psi | 56% | 2697 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,884 psi | 88% | 2871 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 50,618 psi | 78% | 2661 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,483 psi | 68% | 2605 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,140 psi | 77% | 2736 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,778 psi | 78% | 2703 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 42,018 psi | 65% | 2598 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 35,041 psi | 54% | 2526 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 46,282 psi | 71% | 2690 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 39,494 psi | 61% | 2543 fps | 97.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,153 psi | 74% | 2694 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 48,805 psi | 75% | 2684 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,945 psi | 65% | 2717 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,581 psi | 61% | 2575 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,119 psi | 65% | 2628 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 84% | 34,780 psi | 54% | 2523 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,345 psi | 53% | 2543 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 32,387 psi | 50% | 2490 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 37,144 psi | 57% | 2664 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,440 psi | 70% | 2694 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 39,697 psi | 61% | 2585 fps | 98.8% |
| Bofors RP7 | <<locked>> | 90% | 47,848 psi | 74% | 2694 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,864 psi | 77% | 2680 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,268 psi | 73% | 2720 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,576 psi | 79% | 2858 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 80% | 54,810 psi | 84% | 2785 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,190 psi | 62% | 2579 fps | 96.3% |
| Hodgdon H414 | <<locked>> | 90% | 44,469 psi | 68% | 2723 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 92% | 51,227 psi | 79% | 2792 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 46,746 psi | 72% | 2700 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 30,443 psi | 47% | 2379 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,757 psi | 66% | 2677 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 92% | 47,181 psi | 73% | 2792 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,035 psi | 42% | 1549 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,715 psi | 69% | 2654 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 46,398 psi | 71% | 2697 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,408 psi | 64% | 2572 fps | 97.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 46,543 psi | 72% | 2644 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 55,274 psi | 85% | 2697 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 47,645 psi | 73% | 2717 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,456 psi | 71% | 2671 fps | 95.4% |
| IMR 4831 | <<locked>> | 86% | 36,027 psi | 55% | 2533 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 43,149 psi | 66% | 2661 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 80% | 48,153 psi | 74% | 2694 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 55,027 psi | 85% | 2782 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,006 psi | 71% | 2677 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,021 psi | 71% | 2621 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 41,756 psi | 64% | 2585 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 41,365 psi | 64% | 2579 fps | 95.7% |
| Lovex S070 | <<locked>> | 90% | 44,208 psi | 68% | 2654 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 45,948 psi | 71% | 2651 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 45,977 psi | 71% | 2657 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,568 psi | 64% | 2618 fps | 98.4% |
| Norma 204 | <<locked>> | 98% | 54,114 psi | 83% | 2861 fps | 95.2% |
| Norma URP | <<locked>> | 84% | 35,041 psi | 54% | 2520 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 40,799 psi | 63% | 2628 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 40,886 psi | 63% | 2654 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 48,167 psi | 74% | 2703 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,659 psi | 73% | 2723 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,721 psi | 80% | 2740 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,427 psi | 42% | 1585 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 53,780 psi | 83% | 2776 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,859 psi | 66% | 2608 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,135 psi | 68% | 2733 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,347 psi | 56% | 2605 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 36,840 psi | 57% | 2589 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 38,943 psi | 60% | 2641 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 50,357 psi | 77% | 2690 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,801 psi | 67% | 2602 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 37,420 psi | 58% | 2530 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 47,848 psi | 74% | 2694 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 41,365 psi | 64% | 2579 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,006 psi | 71% | 2677 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,756 psi | 64% | 2585 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 44,208 psi | 68% | 2654 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,695 psi | 58% | 2566 fps | 97.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,833 psi | 72% | 2680 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,730 psi | 69% | 2661 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,644 psi | 72% | 2592 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,073 psi | 60% | 2464 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,963 psi | 71% | 2621 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 52,301 psi | 80% | 2779 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,601 psi | 72% | 2598 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,282 psi | 71% | 2677 fps | 99.1% |
| Somchem S355 | <<locked>> | 80% | 38,000 psi | 58% | 2530 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 28,253 psi | 43% | 2375 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 52,286 psi | 80% | 2648 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,804 psi | 72% | 2585 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,018 psi | 66% | 2582 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,395 psi | 67% | 2589 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,100 psi | 56% | 2464 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 36,332 psi | 56% | 2516 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 48,559 psi | 75% | 2694 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 42,032 psi | 65% | 2582 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 35,955 psi | 55% | 2520 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 90% | 32,793 psi | 50% | 2516 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,126 psi | 49% | 2392 fps | 96.2% |
| Winchester 748 | <<locked>> | 80% | 48,109 psi | 74% | 2740 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 44,469 psi | 68% | 2723 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 94% | 30,763 psi | 47% | 2513 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,208 psi | 68% | 2664 fps | 99.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 99 powders for .300 Rem. SA Ultra Mag. loaded with the .308 | 165gr | Barnes X S. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,012 fps; across all powders the maximum-charge window runs from 1,732 fps to 3,012 fps. Accurate 4350 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.