Load Specifications
Load data in caliber .375 H&H Mag. with .375 | 250gr | Swift A-Frame bullet and 92 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 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.
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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>> | 88% | 53,983 psi | 87% | 2628 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 56,028 psi | 90% | 2697 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 54,940 psi | 88% | 2687 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 53,940 psi | 86% | 2707 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 54,520 psi | 87% | 2726 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,557 psi | 75% | 2674 fps | 97.4% |
| Accurate LT-30 | <<locked>> | 82% | 53,751 psi | 86% | 2575 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,157 psi | 87% | 2598 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 56,405 psi | 90% | 2759 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 96% | 53,867 psi | 86% | 2703 fps | 99% |
| ADI AR 2219 | <<locked>> | 82% | 54,244 psi | 87% | 2690 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 55,767 psi | 89% | 2720 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 90% | 55,651 psi | 89% | 2700 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 53,780 psi | 86% | 2769 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 55,796 psi | 89% | 2864 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 53,171 psi | 85% | 2726 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 84% | 53,882 psi | 86% | 2635 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 54,143 psi | 87% | 2746 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,441 psi | 74% | 2684 fps | 97.5% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 53,548 psi | 86% | 2831 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 56,289 psi | 90% | 2618 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 56,318 psi | 90% | 2776 fps | 99% |
| Bofors RP3 | <<locked>> | 96% | 53,447 psi | 86% | 2740 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 88% | 54,607 psi | 88% | 2657 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 54,534 psi | 87% | 2746 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 52,649 psi | 84% | 2782 fps | 99% |
| Hodgdon H322 | <<locked>> | 84% | 52,881 psi | 85% | 2671 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 54,056 psi | 87% | 2697 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 54,969 psi | 88% | 2749 fps | 98.3% |
| Hodgdon H4895 | <<locked>> | 90% | 53,577 psi | 86% | 2723 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,554 psi | 68% | 2572 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 55,579 psi | 89% | 2799 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,824 psi | 56% | 1631 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 54,940 psi | 88% | 2726 fps | 99.7% |
| IMR 3031 | <<locked>> | 92% | 56,202 psi | 90% | 2756 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 53,388 psi | 86% | 2687 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,114 psi | 87% | 2667 fps | 96% |
| IMR 4198 | <<locked>> | 84% | 54,418 psi | 87% | 2598 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,527 psi | 71% | 2625 fps | 97.1% |
| IMR 4895 | <<locked>> | 94% | 55,463 psi | 89% | 2779 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 90% | 55,767 psi | 89% | 2720 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 86% | 55,912 psi | 90% | 2707 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 55,637 psi | 89% | 2740 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 53,359 psi | 86% | 2648 fps | 99.3% |
| Lovex S062 | <<locked>> | 96% | 56,231 psi | 90% | 2736 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,837 psi | 83% | 2674 fps | 97% |
| Norma 201 | <<locked>> | 92% | 55,230 psi | 89% | 2710 fps | 99.9% |
| Norma 202 | <<locked>> | 92% | 55,622 psi | 89% | 2717 fps | 100% |
| Norma 203B | <<locked>> | 94% | 53,200 psi | 85% | 2733 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 46,615 psi | 75% | 2671 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 94% | 53,403 psi | 86% | 2756 fps | 99.3% |
| Ramshot TAC | <<locked>> | 90% | 56,275 psi | 90% | 2730 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,303 psi | 89% | 2749 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 86% | 53,664 psi | 86% | 2671 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,143 psi | 56% | 1670 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 55,535 psi | 89% | 2707 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 55,709 psi | 89% | 2730 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 53,795 psi | 86% | 2805 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 53,606 psi | 86% | 2841 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,267 psi | 74% | 2694 fps | 97% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,587 psi | 76% | 2713 fps | 96.4% |
| Rottweil R 901 | <<locked>> | 90% | 56,246 psi | 90% | 2697 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 55,593 psi | 89% | 2707 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 98% | 53,069 psi | 85% | 2726 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,837 psi | 83% | 2674 fps | 97% |
| Shooters World Match Rifle | <<locked>> | 92% | 55,637 psi | 89% | 2740 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 56,231 psi | 90% | 2736 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,463 psi | 89% | 2677 fps | 99.8% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 54,636 psi | 88% | 2700 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 55,245 psi | 89% | 2789 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 54,955 psi | 88% | 2654 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,418 psi | 87% | 2707 fps | 98.1% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 54,694 psi | 88% | 2730 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,056 psi | 87% | 2615 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 53,563 psi | 86% | 2608 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 53,374 psi | 86% | 2703 fps | 99.9% |
| Somchem S335 | <<locked>> | 92% | 56,362 psi | 90% | 2657 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 53,809 psi | 86% | 2703 fps | 99.3% |
| Somchem S355 | <<locked>> | 98% | 53,809 psi | 86% | 2726 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,452 psi | 66% | 2621 fps | 99.1% |
| Vihtavuori N130 | <<locked>> | 86% | 53,795 psi | 86% | 2585 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 53,983 psi | 87% | 2605 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 54,607 psi | 88% | 2677 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 56,086 psi | 90% | 2694 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,550 psi | 89% | 2713 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,037 psi | 79% | 2671 fps | 97.7% |
| Vihtavuori N530 | <<locked>> | 90% | 56,304 psi | 90% | 2717 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 54,244 psi | 87% | 2690 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 48,109 psi | 77% | 2674 fps | 97.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,212 psi | 81% | 2661 fps | 99.4% |
| Winchester 748 | <<locked>> | 90% | 55,506 psi | 89% | 2762 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 92% | 54,447 psi | 87% | 2740 fps | 99.7% |
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% | 42,264 psi | 68% | 2454 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 45,905 psi | 74% | 2549 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,809 psi | 56% | 2369 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,104 psi | 66% | 2507 fps | 99.6% |
| Accurate 4064 | <<locked>> | 80% | 32,924 psi | 53% | 2352 fps | 98.9% |
| Accurate 4350 | <<locked>> | 94% | 37,855 psi | 61% | 2513 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 50,589 psi | 81% | 2533 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 50,952 psi | 82% | 2552 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,754 psi | 62% | 2457 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 84% | 37,420 psi | 60% | 2411 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 50,734 psi | 81% | 2641 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,799 psi | 65% | 2474 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 80% | 39,943 psi | 64% | 2477 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,195 psi | 76% | 2661 fps | 99% |
| Alliant Power Pro 2000-MR | 69.5 gr | 84% | 40,001 psi | 64% | 2575 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,126 psi | 52% | 2329 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,805 psi | 77% | 2549 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 37,057 psi | 59% | 2441 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 94% | 38,769 psi | 62% | 2526 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 86% | 33,750 psi | 54% | 2438 fps | 95.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,501 psi | 79% | 2526 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,594 psi | 60% | 2451 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 31,415 psi | 50% | 2326 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,917 psi | 69% | 2474 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,986 psi | 63% | 2487 fps | 98.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,641 psi | 68% | 2608 fps | 97.2% |
| Hodgdon H322 | <<locked>> | 80% | 46,412 psi | 74% | 2575 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,268 psi | 76% | 2598 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 42,366 psi | 68% | 2539 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 39,044 psi | 63% | 2467 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 33,199 psi | 53% | 2372 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,983 psi | 56% | 2431 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,773 psi | 41% | 1453 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,579 psi | 60% | 2425 fps | 96.9% |
| IMR 3031 | <<locked>> | 80% | 38,014 psi | 61% | 2474 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 36,883 psi | 59% | 2395 fps | 95.6% |
| IMR 4166 Enduron | <<locked>> | 90% | 50,821 psi | 81% | 2615 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 48,341 psi | 78% | 2516 fps | 100% |
| IMR 4831 | <<locked>> | 96% | 39,044 psi | 63% | 2520 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 35,462 psi | 57% | 2418 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 40,799 psi | 65% | 2474 fps | 98.4% |
| Lovex D073.5 | <<locked>> | 80% | 45,614 psi | 73% | 2552 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 37,144 psi | 60% | 2438 fps | 99% |
| Lovex S060 | <<locked>> | 80% | 39,450 psi | 63% | 2405 fps | 96.9% |
| Lovex S062 | <<locked>> | 80% | 34,330 psi | 55% | 2352 fps | 96.9% |
| Lovex S065 | <<locked>> | 96% | 45,992 psi | 74% | 2579 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 38,130 psi | 61% | 2418 fps | 97.9% |
| Norma 202 | <<locked>> | 80% | 38,116 psi | 61% | 2434 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 34,055 psi | 55% | 2379 fps | 95.2% |
| Norma URP | <<locked>> | 94% | 38,508 psi | 62% | 2516 fps | 95% |
| Ramshot Big Game | <<locked>> | 82% | 35,795 psi | 57% | 2434 fps | 95.5% |
| Ramshot TAC | <<locked>> | 82% | 43,352 psi | 70% | 2516 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,827 psi | 64% | 2487 fps | 97% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,179 psi | 71% | 2516 fps | 97.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,991 psi | 42% | 1490 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,759 psi | 73% | 2556 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 48,994 psi | 79% | 2628 fps | 95.6% |
| ReloadSwiss RS 52 | 64.1 gr | 80% | 35,665 psi | 57% | 2470 fps | 95% |
| ReloadSwiss RS 60 | 65.1 gr | 80% | 29,602 psi | 47% | 2336 fps | 95.9% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 40,524 psi | 65% | 2582 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 44,367 psi | 71% | 2651 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 41,843 psi | 67% | 2470 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 36,274 psi | 58% | 2372 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 82% | 31,604 psi | 51% | 2323 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 96% | 45,992 psi | 74% | 2579 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,144 psi | 60% | 2438 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 34,330 psi | 55% | 2352 fps | 96.9% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,443 psi | 78% | 2575 fps | 99.3% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,256 psi | 82% | 2651 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 34,940 psi | 56% | 2421 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,443 psi | 78% | 2566 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 41,365 psi | 66% | 2490 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,260 psi | 60% | 2425 fps | 96.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,639 psi | 64% | 2388 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,590 psi | 52% | 2257 fps | 99.2% |
| Somchem S321 | <<locked>> | 80% | 43,700 psi | 70% | 2546 fps | 99.1% |
| Somchem S335 | <<locked>> | 80% | 39,262 psi | 63% | 2392 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 38,276 psi | 61% | 2438 fps | 96.5% |
| Somchem S355 | <<locked>> | 82% | 32,764 psi | 53% | 2336 fps | 95.3% |
| Somchem S365 | <<locked>> | 90% | 30,269 psi | 49% | 2359 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 44,933 psi | 72% | 2461 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,784 psi | 64% | 2388 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,070 psi | 56% | 2365 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,969 psi | 58% | 2372 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 80% | 29,037 psi | 47% | 2228 fps | 95.4% |
| Vihtavuori N160 | <<locked>> | 94% | 40,553 psi | 65% | 2520 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 40,698 psi | 65% | 2467 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 80% | 34,664 psi | 56% | 2359 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 94% | 39,653 psi | 64% | 2523 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 33,910 psi | 54% | 2349 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 39,639 psi | 64% | 2507 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,477 psi | 58% | 2428 fps | 96.7% |
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 92 powders for .375 H&H Mag. loaded with the .375 | 250gr | Swift A-Frame. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,864 fps; across all powders the maximum-charge window runs from 1,631 fps to 2,864 fps. Accurate 4350 gives the best case fill at 100 %, and 92 of the 92 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 Power Pro 2000-MR, ReloadSwiss RS 52, ReloadSwiss RS 60 rank at the top here: for .375 H&H Mag. with the .375 | 250gr | Swift A-Frame 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.