Load Specifications
Load data in caliber .375 Weath. Mag. with .375 | 250gr | Alaska Bullet Works Kodiak SP SPBC bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR and ReloadSwiss RS 52.
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.
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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>> | 86% | 54,650 psi | 86% | 2677 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 56,768 psi | 89% | 2753 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 56,333 psi | 88% | 2743 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,955 psi | 86% | 2762 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 56,304 psi | 88% | 2740 fps | 96.3% |
| Accurate 4064 | <<locked>> | 94% | 55,985 psi | 88% | 2785 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,953 psi | 81% | 2805 fps | 98.9% |
| Accurate LT-30 | <<locked>> | 82% | 57,101 psi | 89% | 2667 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 57,580 psi | 90% | 2694 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 57,203 psi | 90% | 2822 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 54,607 psi | 86% | 2766 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 88% | 56,347 psi | 88% | 2776 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 56,884 psi | 89% | 2753 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,549 psi | 85% | 2825 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 56,898 psi | 89% | 2936 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 57,667 psi | 90% | 2835 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,447 psi | 85% | 2684 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,114 psi | 86% | 2808 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,328 psi | 79% | 2805 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,868 psi | 86% | 2904 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,795 psi | 56% | 2539 fps | 96.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 56,333 psi | 88% | 2664 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 57,058 psi | 89% | 2835 fps | 99.5% |
| Bofors RP3 | <<locked>> | 94% | 54,752 psi | 86% | 2802 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,201 psi | 87% | 2766 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,882 psi | 86% | 2713 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,579 psi | 87% | 2805 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 57,595 psi | 90% | 2900 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 56,985 psi | 89% | 2769 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,578 psi | 86% | 2749 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,101 psi | 88% | 2815 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,143 psi | 86% | 2854 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 98% | 56,260 psi | 88% | 2818 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 88% | 54,273 psi | 85% | 2779 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,586 psi | 73% | 2690 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,956 psi | 89% | 2864 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 56,507 psi | 89% | 2894 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,099 psi | 55% | 1680 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,492 psi | 87% | 2782 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 57,435 psi | 90% | 2815 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 57,537 psi | 90% | 2799 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,462 psi | 85% | 2726 fps | 96.8% |
| IMR 4198 | <<locked>> | 82% | 54,679 psi | 86% | 2644 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 57,348 psi | 90% | 2799 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,153 psi | 77% | 2746 fps | 98.5% |
| IMR 4895 | <<locked>> | 92% | 56,507 psi | 89% | 2841 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 56,347 psi | 88% | 2776 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 56,637 psi | 89% | 2762 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 56,753 psi | 89% | 2799 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,927 psi | 89% | 2749 fps | 99.8% |
| Lovex S062 | <<locked>> | 94% | 57,188 psi | 90% | 2795 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 56,246 psi | 88% | 2789 fps | 98.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,548 psi | 84% | 2769 fps | 96.9% |
| Norma 201 | <<locked>> | 90% | 55,825 psi | 87% | 2766 fps | 100% |
| Norma 202 | <<locked>> | 90% | 56,275 psi | 88% | 2769 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,273 psi | 85% | 2795 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 51,126 psi | 80% | 2792 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 92% | 54,737 psi | 86% | 2822 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,198 psi | 79% | 2785 fps | 97% |
| Ramshot TAC | <<locked>> | 88% | 56,739 psi | 89% | 2792 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 88% | 56,144 psi | 88% | 2808 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 57,479 psi | 90% | 2776 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,578 psi | 56% | 1719 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,912 psi | 88% | 2756 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 56,623 psi | 89% | 2795 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,361 psi | 87% | 2874 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,636 psi | 86% | 2904 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,387 psi | 81% | 2825 fps | 98.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,895 psi | 81% | 2848 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 88% | 56,985 psi | 89% | 2753 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,318 psi | 88% | 2762 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,607 psi | 86% | 2792 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 55,201 psi | 87% | 2766 fps | 96.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 56,246 psi | 88% | 2789 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 90% | 56,753 psi | 89% | 2799 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 57,188 psi | 90% | 2795 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,548 psi | 84% | 2769 fps | 96.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,521 psi | 87% | 2726 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 56,391 psi | 88% | 2851 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,259 psi | 87% | 2703 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,969 psi | 86% | 2766 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,637 psi | 87% | 2792 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,491 psi | 85% | 2667 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,302 psi | 85% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 57,014 psi | 89% | 2746 fps | 97.2% |
| Somchem S321 | <<locked>> | 86% | 57,682 psi | 90% | 2808 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 56,826 psi | 89% | 2707 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,592 psi | 86% | 2762 fps | 99.7% |
| Somchem S355 | <<locked>> | 96% | 55,027 psi | 86% | 2789 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,716 psi | 72% | 2746 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 86% | 57,406 psi | 90% | 2674 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,592 psi | 86% | 2654 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,854 psi | 88% | 2733 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 56,811 psi | 89% | 2746 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 56,710 psi | 89% | 2772 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,940 psi | 85% | 2795 fps | 99% |
| Vihtavuori N530 | <<locked>> | 88% | 56,913 psi | 89% | 2776 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,071 psi | 86% | 2746 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,852 psi | 83% | 2795 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,464 psi | 60% | 2615 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,679 psi | 86% | 2779 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 56,579 psi | 89% | 2822 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,419 psi | 87% | 2858 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,303 psi | 87% | 2799 fps | 99.9% |
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% | 45,513 psi | 71% | 2546 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,632 psi | 78% | 2651 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,130 psi | 60% | 2467 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,730 psi | 70% | 2608 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 52,634 psi | 82% | 2684 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 36,071 psi | 57% | 2454 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 36,666 psi | 57% | 2526 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 53,635 psi | 84% | 2618 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 54,041 psi | 85% | 2644 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,785 psi | 65% | 2562 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 80% | 35,563 psi | 56% | 2415 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,816 psi | 69% | 2575 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 43,613 psi | 68% | 2569 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,039 psi | 80% | 2772 fps | 99.7% |
| Alliant Power Pro 2000-MR | 72.1 gr | 80% | 37,753 psi | 59% | 2572 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,969 psi | 55% | 2434 fps | 97.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,227 psi | 80% | 2638 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,608 psi | 59% | 2493 fps | 96.5% |
| Alliant Reloder-16 | <<locked>> | 90% | 37,130 psi | 58% | 2539 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 82% | 32,198 psi | 50% | 2444 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 33,779 psi | 53% | 2487 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,953 psi | 83% | 2618 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,872 psi | 64% | 2562 fps | 96.8% |
| Bofors RP3 | <<locked>> | 80% | 34,476 psi | 54% | 2438 fps | 97.2% |
| Bofors RP7 | <<locked>> | 96% | 52,025 psi | 82% | 2717 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,774 psi | 72% | 2569 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,293 psi | 66% | 2592 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,514 psi | 73% | 2726 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 50,227 psi | 79% | 2674 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,053 psi | 80% | 2697 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 37,782 psi | 59% | 2490 fps | 95% |
| Hodgdon H414 | <<locked>> | 96% | 48,269 psi | 76% | 2743 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 96% | 52,837 psi | 83% | 2769 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 42,163 psi | 66% | 2572 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 31,995 psi | 50% | 2385 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,971 psi | 60% | 2539 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 98% | 52,562 psi | 82% | 2831 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,107 psi | 41% | 1499 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,495 psi | 63% | 2526 fps | 98.2% |
| IMR 3031 | <<locked>> | 80% | 41,481 psi | 65% | 2575 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,289 psi | 58% | 2448 fps | 96.5% |
| IMR 4166 Enduron | <<locked>> | 86% | 48,153 psi | 75% | 2625 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 51,430 psi | 81% | 2598 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 47,848 psi | 75% | 2648 fps | 95.2% |
| IMR 4831 | <<locked>> | 90% | 35,491 psi | 56% | 2484 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 38,508 psi | 60% | 2526 fps | 97.4% |
| IMR 8208 XBR | <<locked>> | 80% | 43,816 psi | 69% | 2575 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 49,530 psi | 78% | 2661 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,611 psi | 64% | 2546 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 42,206 psi | 66% | 2507 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 37,188 psi | 58% | 2454 fps | 98.2% |
| Lovex S065 | <<locked>> | 90% | 41,437 psi | 65% | 2539 fps | 95.2% |
| Lovex S070 | <<locked>> | 96% | 47,398 psi | 74% | 2667 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 41,089 psi | 64% | 2523 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 41,147 psi | 64% | 2533 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 36,999 psi | 58% | 2484 fps | 96.9% |
| Norma URP | <<locked>> | 90% | 37,130 psi | 58% | 2530 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 36,332 psi | 57% | 2490 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 96% | 44,121 psi | 69% | 2674 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 43,700 psi | 68% | 2572 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,134 psi | 68% | 2595 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,398 psi | 74% | 2621 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,484 psi | 42% | 1535 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,255 psi | 77% | 2661 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 43,627 psi | 68% | 2579 fps | 95% |
| ReloadSwiss RS 52 | 69.9 gr | 80% | 39,030 psi | 61% | 2589 fps | 96.9% |
| ReloadSwiss RS 60 | 71 gr | 80% | 32,082 psi | 50% | 2454 fps | 97.9% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 39,073 psi | 61% | 2598 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,409 psi | 66% | 2667 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 44,831 psi | 70% | 2566 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,044 psi | 61% | 2474 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 32,416 psi | 51% | 2382 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 96% | 52,025 psi | 82% | 2717 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,437 psi | 65% | 2539 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,611 psi | 64% | 2546 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 37,188 psi | 58% | 2454 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 96% | 47,398 psi | 74% | 2667 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,880 psi | 81% | 2674 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,373 psi | 52% | 2425 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,924 psi | 81% | 2657 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,974 psi | 66% | 2546 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,277 psi | 63% | 2530 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,424 psi | 66% | 2480 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,099 psi | 55% | 2349 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 46,862 psi | 73% | 2592 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 47,311 psi | 74% | 2654 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 42,134 psi | 66% | 2487 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,640 psi | 65% | 2546 fps | 97.9% |
| Somchem S355 | <<locked>> | 80% | 33,460 psi | 52% | 2392 fps | 96.2% |
| Somchem S365 | <<locked>> | 86% | 29,182 psi | 46% | 2369 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 47,979 psi | 75% | 2546 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,670 psi | 67% | 2480 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,203 psi | 60% | 2464 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,986 psi | 61% | 2470 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 31,676 psi | 50% | 2329 fps | 97.1% |
| Vihtavuori N160 | <<locked>> | 88% | 36,463 psi | 57% | 2477 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 43,918 psi | 69% | 2572 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 37,507 psi | 59% | 2457 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 38,130 psi | 60% | 2533 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 96% | 33,866 psi | 53% | 2507 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 32,184 psi | 50% | 2352 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 43,221 psi | 68% | 2612 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 48,428 psi | 76% | 2746 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,610 psi | 62% | 2533 fps | 98.1% |
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 116 powders for .375 Weath. Mag. loaded with the .375 | 250gr | Alaska Bullet Works Kodiak SP SPBC. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,936 fps; across all powders the maximum-charge window runs from 1,680 fps to 2,936 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 50–90 %, 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, Accurate 4350, ADI AR 2209 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 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for .375 Weath. 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. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.