Load Specifications
Bullet Manufacturer:Alaska Bullet Works
Bullet Weight:250 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:.375 Rem. Ultra Mag. load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:117 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:6.0
Load data in caliber .375 Rem. Ultra Mag. with .375 | 250gr | Alaska Bullet Works Kodiak SP SPBC bullet and 102 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and ReloadSwiss RS 60.
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>> | 82% | 56,449 psi | 88% | 2680 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,985 psi | 88% | 2707 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,651 psi | 87% | 2753 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,579 psi | 87% | 2713 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,891 psi | 73% | 2674 fps | 98% |
| Accurate 4064 | <<locked>> | 88% | 56,188 psi | 88% | 2753 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,666 psi | 89% | 2844 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 55,796 psi | 87% | 2785 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,782 psi | 89% | 2782 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,331 psi | 85% | 2822 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,447 psi | 85% | 2733 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,753 psi | 87% | 2707 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,825 psi | 87% | 2900 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,217 psi | 90% | 2805 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 57,653 psi | 90% | 2825 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,232 psi | 90% | 2897 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,897 psi | 86% | 2874 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,258 psi | 83% | 2808 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,150 psi | 69% | 2700 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,870 psi | 61% | 2605 fps | 96.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,328 psi | 79% | 2874 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,637 psi | 87% | 2795 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 54,607 psi | 86% | 2772 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,201 psi | 85% | 2746 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,869 psi | 88% | 2713 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,230 psi | 85% | 2759 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,274 psi | 87% | 2785 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 94% | 55,376 psi | 87% | 2841 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 92% | 55,637 psi | 87% | 2802 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 84% | 56,376 psi | 88% | 2795 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 57,508 psi | 90% | 2822 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,289 psi | 88% | 2825 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,854 psi | 88% | 2871 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,868 psi | 56% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 57,450 psi | 90% | 2792 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,594 psi | 89% | 2772 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,231 psi | 88% | 2766 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,898 psi | 88% | 2749 fps | 98.6% |
| IMR 4350 | <<locked>> | 96% | 54,984 psi | 86% | 2776 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,014 psi | 88% | 2776 fps | 98.5% |
| IMR 4831 | <<locked>> | 98% | 57,029 psi | 89% | 2831 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 55,608 psi | 87% | 2805 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,447 psi | 85% | 2733 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,825 psi | 87% | 2756 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,766 psi | 86% | 2710 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,304 psi | 88% | 2762 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,869 psi | 88% | 2772 fps | 99.4% |
| Lovex S070 | <<locked>> | 96% | 57,043 psi | 89% | 2808 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,914 psi | 61% | 2530 fps | 96% |
| Norma 201 | <<locked>> | 84% | 54,462 psi | 85% | 2730 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,984 psi | 86% | 2726 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,898 psi | 89% | 2815 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,666 psi | 87% | 2822 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 49,661 psi | 78% | 2825 fps | 97.7% |
| Norma URP | <<locked>> | 96% | 55,390 psi | 87% | 2831 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 54,041 psi | 85% | 2785 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,143 psi | 85% | 2825 fps | 99.1% |
| Ramshot TAC | <<locked>> | 82% | 54,636 psi | 86% | 2749 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,665 psi | 86% | 2769 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,390 psi | 57% | 1768 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,216 psi | 87% | 2766 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,766 psi | 86% | 2841 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,607 psi | 86% | 2874 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,362 psi | 88% | 2864 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,332 psi | 87% | 2890 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 82% | 55,361 psi | 87% | 2710 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,042 psi | 86% | 2730 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,447 psi | 85% | 2766 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 56,202 psi | 88% | 2795 fps | 96.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,315 psi | 82% | 2792 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 92% | 54,201 psi | 85% | 2746 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,869 psi | 88% | 2772 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,825 psi | 87% | 2756 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,304 psi | 88% | 2762 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,043 psi | 89% | 2808 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,188 psi | 88% | 2822 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,174 psi | 90% | 2785 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,157 psi | 85% | 2753 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,477 psi | 87% | 2667 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,159 psi | 88% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,825 psi | 87% | 2723 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,822 psi | 81% | 2789 fps | 96.7% |
| Somchem S335 | <<locked>> | 84% | 55,158 psi | 86% | 2664 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,637 psi | 89% | 2772 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,679 psi | 86% | 2766 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 57,638 psi | 90% | 2877 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,127 psi | 83% | 2772 fps | 97.8% |
| Vihtavuori N133 | <<locked>> | 84% | 55,869 psi | 88% | 2651 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,114 psi | 86% | 2694 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,666 psi | 87% | 2707 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,999 psi | 88% | 2736 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,027 psi | 85% | 2772 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 54,969 psi | 86% | 2733 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 57,435 psi | 90% | 2749 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,811 psi | 89% | 2828 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,211 psi | 77% | 2772 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,983 psi | 85% | 2746 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,259 psi | 87% | 2776 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,535 psi | 87% | 2841 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,813 psi | 62% | 2730 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,244 psi | 85% | 2762 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,763 psi | 78% | 2707 fps | 95.9% |
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 2015 | <<locked>> | 80% | 52,982 psi | 83% | 2635 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,977 psi | 72% | 2569 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,011 psi | 82% | 2703 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 42,815 psi | 67% | 2507 fps | 95% |
| Accurate 3100 | <<locked>> | 94% | 38,087 psi | 60% | 2513 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 43,497 psi | 68% | 2572 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,416 psi | 51% | 2408 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 49,081 psi | 77% | 2684 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 41,655 psi | 65% | 2536 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 96% | 47,732 psi | 75% | 2713 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,198 psi | 80% | 2687 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,344 psi | 82% | 2661 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,136 psi | 71% | 2726 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,698 psi | 65% | 2559 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,715 psi | 70% | 2625 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,416 psi | 51% | 2421 fps | 95.5% |
| Alliant Reloder-17 | 81.2 gr | 80% | 36,303 psi | 57% | 2543 fps | 98.7% |
| Alliant Reloder-19 | <<locked>> | 96% | 46,992 psi | 74% | 2703 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,413 psi | 45% | 2336 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,521 psi | 57% | 2549 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 90% | 35,070 psi | 55% | 2562 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,675 psi | 76% | 2690 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 41,669 psi | 65% | 2569 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 42,308 psi | 66% | 2543 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,576 psi | 82% | 2667 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,618 psi | 79% | 2707 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,351 psi | 66% | 2572 fps | 98% |
| Hodgdon H414 | <<locked>> | 84% | 39,610 psi | 62% | 2566 fps | 95% |
| Hodgdon H4350 | <<locked>> | 86% | 45,832 psi | 72% | 2641 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 49,603 psi | 78% | 2694 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,863 psi | 47% | 2326 fps | 96.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,876 psi | 72% | 2667 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 41,771 psi | 65% | 2628 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,760 psi | 42% | 1549 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,413 psi | 74% | 2644 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 49,748 psi | 78% | 2680 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,787 psi | 69% | 2572 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,137 psi | 72% | 2592 fps | 96.8% |
| IMR 4350 | <<locked>> | 88% | 42,714 psi | 67% | 2569 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,176 psi | 65% | 2520 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 31,430 psi | 49% | 2369 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 45,832 psi | 72% | 2654 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 51,198 psi | 80% | 2687 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,762 psi | 76% | 2657 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,559 psi | 76% | 2618 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 43,888 psi | 69% | 2572 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 36,143 psi | 57% | 2421 fps | 95.3% |
| Lovex S070 | <<locked>> | 84% | 39,088 psi | 61% | 2500 fps | 95% |
| Lovex S071 | <<locked>> | 98% | 36,361 psi | 57% | 2477 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 48,008 psi | 75% | 2635 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,457 psi | 76% | 2635 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,063 psi | 69% | 2612 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 48,559 psi | 76% | 2710 fps | 95.5% |
| Norma MRP | <<locked>> | 94% | 40,437 psi | 63% | 2651 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 32,532 psi | 51% | 2408 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 43,918 psi | 69% | 2625 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 38,769 psi | 61% | 2552 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 51,126 psi | 80% | 2697 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,039 psi | 80% | 2717 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,166 psi | 43% | 1585 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,569 psi | 67% | 2556 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,674 psi | 75% | 2730 fps | 99.6% |
| ReloadSwiss RS 60 | 81.2 gr | 80% | 38,638 psi | 61% | 2605 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,140 psi | 50% | 2421 fps | 95% |
| ReloadSwiss RS 70 | 86.6 gr | 84% | 36,651 psi | 57% | 2539 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 80% | 52,025 psi | 82% | 2664 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,716 psi | 72% | 2589 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,160 psi | 61% | 2513 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 98% | 52,678 psi | 83% | 2743 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 96% | 45,774 psi | 72% | 2684 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 84% | 42,308 psi | 66% | 2543 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,143 psi | 57% | 2421 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,762 psi | 76% | 2657 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,888 psi | 69% | 2572 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 39,088 psi | 61% | 2500 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,219 psi | 63% | 2562 fps | 98.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,734 psi | 78% | 2674 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,572 psi | 75% | 2651 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,124 psi | 77% | 2579 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,191 psi | 65% | 2451 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,321 psi | 63% | 2467 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 45,324 psi | 71% | 2680 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 48,805 psi | 76% | 2579 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,545 psi | 78% | 2671 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 39,798 psi | 62% | 2520 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 29,269 psi | 46% | 2365 fps | 97.7% |
| Somchem S385 | <<locked>> | 94% | 43,511 psi | 68% | 2612 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 49,530 psi | 78% | 2569 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,556 psi | 71% | 2562 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,919 psi | 72% | 2572 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,884 psi | 59% | 2454 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 33,953 psi | 53% | 2411 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 51,372 psi | 81% | 2680 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,425 psi | 70% | 2566 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,518 psi | 53% | 2411 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 86% | 30,864 psi | 48% | 2411 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,605 psi | 53% | 2388 fps | 98.1% |
| Winchester 748 | <<locked>> | 80% | 51,663 psi | 81% | 2726 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 39,740 psi | 62% | 2566 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,601 psi | 45% | 2415 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,340 psi | 74% | 2657 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 98% | 46,528 psi | 73% | 2654 fps | 95.1% |
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 102 powders for .375 Rem. Ultra Mag. loaded with the .375 | 250gr | Alaska Bullet Works Kodiak SP SPBC. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,900 fps; across all powders the maximum-charge window runs from 1,729 fps to 2,900 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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. ReloadSwiss RS 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .375 Rem. Ultra Mag. with the .375 | 250gr | Alaska Bullet Works Kodiak SP SPBC 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.