Load Specifications
Load data in caliber .375 H&H Mag. with .375 | 250gr | Lehigh Defense Controlled Fracturing bullet and 90 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 Hodgdon CFE223.
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>> | 92% | 54,505 psi | 87% | 2605 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 55,535 psi | 89% | 2697 fps | 98.6% |
| Accurate 2230 | <<locked>> | 84% | 56,304 psi | 90% | 2707 fps | 98.9% |
| Accurate 2460 | <<locked>> | 88% | 52,953 psi | 85% | 2628 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 53,867 psi | 86% | 2651 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 54,157 psi | 87% | 2680 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 53,505 psi | 86% | 2687 fps | 100% |
| Accurate LT-30 | <<locked>> | 86% | 55,463 psi | 89% | 2562 fps | 100% |
| Accurate LT-32 | <<locked>> | 86% | 55,898 psi | 90% | 2582 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 53,490 psi | 86% | 2680 fps | 99% |
| ADI AR 2207 | <<locked>> | 82% | 53,403 psi | 86% | 2539 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 54,578 psi | 88% | 2674 fps | 98.6% |
| ADI AR 2219 | <<locked>> | 86% | 55,695 psi | 89% | 2677 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 53,113 psi | 85% | 2644 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 94% | 55,753 psi | 89% | 2677 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 54,433 psi | 87% | 2743 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 53,156 psi | 85% | 2779 fps | 98.3% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 53,142 psi | 85% | 2690 fps | 99.5% |
| Alliant Reloder-10x | <<locked>> | 88% | 54,723 psi | 88% | 2618 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 54,375 psi | 87% | 2713 fps | 98.7% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 47,079 psi | 75% | 2684 fps | 98.4% |
| Alliant Reloder-7 | <<locked>> | 82% | 54,389 psi | 87% | 2556 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 54,418 psi | 87% | 2562 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 53,316 psi | 85% | 2694 fps | 98.1% |
| Bofors RP3ᴾ | <<locked>> | 100% | 53,156 psi | 85% | 2703 fps | 99.5% |
| Hodgdon Benchmark | <<locked>> | 92% | 55,608 psi | 89% | 2638 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 94% | 55,114 psi | 88% | 2723 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 90% | 53,156 psi | 85% | 2756 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 88% | 53,867 psi | 86% | 2654 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 54,940 psi | 88% | 2677 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 55,347 psi | 89% | 2713 fps | 97.8% |
| Hodgdon H4198 | <<locked>> | 82% | 54,128 psi | 87% | 2562 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 53,925 psi | 86% | 2694 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 55,782 psi | 89% | 2766 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,924 psi | 54% | 1581 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 55,695 psi | 89% | 2697 fps | 99.4% |
| IMR 3031 | <<locked>> | 96% | 56,391 psi | 90% | 2733 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 53,940 psi | 86% | 2657 fps | 98.7% |
| IMR 4198 | <<locked>> | 88% | 55,637 psi | 89% | 2582 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 55,709 psi | 89% | 2746 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 92% | 53,113 psi | 85% | 2644 fps | 99.6% |
| Lovex D073.4 | <<locked>> | 82% | 52,968 psi | 85% | 2635 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 52,852 psi | 85% | 2635 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 96% | 55,651 psi | 89% | 2710 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 54,317 psi | 87% | 2621 fps | 99% |
| Lovex S062ᴾ | <<locked>> | 100% | 56,246 psi | 90% | 2700 fps | 99.8% |
| Norma 200 | <<locked>> | 84% | 54,505 psi | 87% | 2592 fps | 100% |
| Norma 201 | <<locked>> | 96% | 55,579 psi | 89% | 2680 fps | 99.8% |
| Norma 202 | <<locked>> | 96% | 55,811 psi | 89% | 2687 fps | 100% |
| Norma 203B | <<locked>> | 98% | 53,417 psi | 86% | 2703 fps | 99% |
| Ramshot Big Game | <<locked>> | 98% | 53,911 psi | 86% | 2726 fps | 98.9% |
| Ramshot TAC | <<locked>> | 92% | 53,867 psi | 86% | 2654 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 94% | 56,318 psi | 90% | 2726 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 90% | 54,795 psi | 88% | 2651 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,171 psi | 55% | 1621 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 53,055 psi | 85% | 2638 fps | 100% |
| ReloadSwiss RS 50ᴾ | <<locked>> | 100% | 56,362 psi | 90% | 2697 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 53,998 psi | 87% | 2776 fps | 98.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 50,401 psi | 81% | 2753 fps | 100% |
| Rottweil R 901 | <<locked>> | 94% | 56,289 psi | 90% | 2667 fps | 100% |
| Rottweil R 902 | <<locked>> | 98% | 55,811 psi | 89% | 2674 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 49,342 psi | 79% | 2641 fps | 99% |
| Shooters World AR Plus | <<locked>> | 82% | 52,968 psi | 85% | 2635 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 96% | 55,651 psi | 89% | 2710 fps | 100% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 56,246 psi | 90% | 2700 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 53,084 psi | 85% | 2605 fps | 99.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 56,057 psi | 90% | 2333 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 55,796 psi | 89% | 2684 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 51,793 psi | 83% | 2703 fps | 98.7% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 55,854 psi | 90% | 2635 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 55,259 psi | 89% | 2680 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 55,608 psi | 89% | 2707 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 54,882 psi | 88% | 2592 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 54,041 psi | 87% | 2585 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 54,215 psi | 87% | 2680 fps | 99.8% |
| Somchem S335 | <<locked>> | 94% | 53,592 psi | 86% | 2589 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 54,592 psi | 88% | 2677 fps | 99% |
| Somchem S355ᴾ | <<locked>> | 100% | 50,372 psi | 81% | 2644 fps | 98.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 35,998 psi | 58% | 2470 fps | 97% |
| Vihtavuori N120 | <<locked>> | 82% | 53,316 psi | 85% | 2493 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 54,694 psi | 88% | 2566 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 54,621 psi | 88% | 2582 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 54,534 psi | 87% | 2648 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 52,968 psi | 85% | 2625 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 48,689 psi | 78% | 2585 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 92% | 53,679 psi | 86% | 2648 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 98% | 54,679 psi | 88% | 2667 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 44,454 psi | 71% | 2523 fps | 97.8% |
| Winchester 748 | <<locked>> | 94% | 56,072 psi | 90% | 2736 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 96% | 54,911 psi | 88% | 2713 fps | 99.4% |
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% | 37,304 psi | 60% | 2346 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 48,515 psi | 78% | 2589 fps | 97.5% |
| Accurate 2230 | <<locked>> | 80% | 48,675 psi | 78% | 2595 fps | 97.9% |
| Accurate 2460 | <<locked>> | 80% | 40,350 psi | 65% | 2431 fps | 99.4% |
| Accurate 2495 | <<locked>> | 80% | 29,298 psi | 47% | 2238 fps | 99.4% |
| Accurate 2520 | <<locked>> | 80% | 35,607 psi | 57% | 2375 fps | 98.3% |
| Accurate 4064 | <<locked>> | 80% | 27,746 psi | 44% | 2215 fps | 96.9% |
| Accurate LT-30 | <<locked>> | 80% | 46,079 psi | 74% | 2431 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 46,456 psi | 74% | 2448 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 82% | 36,463 psi | 58% | 2379 fps | 95.3% |
| ADI AR 2207 | <<locked>> | 80% | 49,995 psi | 80% | 2497 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 40,016 psi | 64% | 2434 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 45,295 psi | 73% | 2530 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,201 psi | 58% | 2352 fps | 96.6% |
| Alliant AR-Comp | <<locked>> | 80% | 34,635 psi | 56% | 2365 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 41,553 psi | 67% | 2530 fps | 97.5% |
| Alliant Power Pro 2000-MR | 66.2 gr | 88% | 40,335 psi | 65% | 2543 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 33,910 psi | 54% | 2352 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 42,540 psi | 68% | 2441 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 39,349 psi | 63% | 2461 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 92% | 36,100 psi | 58% | 2461 fps | 95.2% |
| Alliant Reloder-7 | <<locked>> | 80% | 51,010 psi | 82% | 2513 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 44,788 psi | 72% | 2428 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 40,640 psi | 65% | 2480 fps | 95.2% |
| Bofors RP3 | <<locked>> | 86% | 32,895 psi | 53% | 2343 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 38,551 psi | 62% | 2359 fps | 97.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 33,837 psi | 54% | 2352 fps | 96.6% |
| Hodgdon CFE223 | 63.2 gr | 82% | 40,277 psi | 65% | 2530 fps | 95.8% |
| Hodgdon H322 | <<locked>> | 80% | 41,408 psi | 66% | 2464 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 80% | 41,872 psi | 67% | 2480 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 94% | 45,339 psi | 73% | 2559 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 50,821 psi | 81% | 2516 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 34,360 psi | 55% | 2343 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 32,721 psi | 52% | 2349 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,005 psi | 40% | 1411 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 35,665 psi | 57% | 2352 fps | 95.6% |
| IMR 3031 | <<locked>> | 80% | 32,982 psi | 53% | 2352 fps | 99.5% |
| IMR 4064 | <<locked>> | 88% | 39,523 psi | 63% | 2418 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 43,845 psi | 70% | 2421 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 35,389 psi | 57% | 2392 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 36,201 psi | 58% | 2352 fps | 96.6% |
| Lovex D073.4 | <<locked>> | 80% | 49,371 psi | 79% | 2585 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 40,118 psi | 64% | 2431 fps | 98.5% |
| Lovex D073.6 | <<locked>> | 80% | 32,082 psi | 51% | 2310 fps | 97.2% |
| Lovex S060 | <<locked>> | 82% | 37,768 psi | 61% | 2339 fps | 95.7% |
| Lovex S062 | <<locked>> | 82% | 31,995 psi | 51% | 2277 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 47,935 psi | 77% | 2503 fps | 100% |
| Norma 201 | <<locked>> | 80% | 33,402 psi | 54% | 2293 fps | 95.8% |
| Norma 202 | <<locked>> | 80% | 33,417 psi | 54% | 2310 fps | 98.2% |
| Norma 203B | <<locked>> | 86% | 36,201 psi | 58% | 2402 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 88% | 38,348 psi | 61% | 2461 fps | 95.6% |
| Ramshot TAC | <<locked>> | 88% | 47,326 psi | 76% | 2552 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 37,463 psi | 60% | 2411 fps | 95.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,349 psi | 63% | 2395 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,150 psi | 40% | 1447 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 40,770 psi | 65% | 2441 fps | 98.9% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 52,736 psi | 85% | 2644 fps | 95.6% |
| ReloadSwiss RS 52 | 62.8 gr | 86% | 38,276 psi | 61% | 2500 fps | 95.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 31,618 psi | 51% | 2359 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 36,840 psi | 59% | 2349 fps | 98.8% |
| Rottweil R 902 | <<locked>> | 80% | 31,734 psi | 51% | 2247 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 88% | 32,982 psi | 53% | 2336 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 49,371 psi | 79% | 2585 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,082 psi | 51% | 2310 fps | 97.2% |
| Shooters World Precision | <<locked>> | 82% | 31,995 psi | 51% | 2277 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 43,207 psi | 69% | 2451 fps | 98% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 50,531 psi | 81% | 2267 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 45,643 psi | 73% | 2536 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 37,362 psi | 60% | 2444 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 43,511 psi | 70% | 2461 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 44,657 psi | 72% | 2516 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 37,550 psi | 60% | 2402 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,491 psi | 57% | 2280 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,790 psi | 46% | 2149 fps | 97.8% |
| Somchem S321 | <<locked>> | 80% | 38,522 psi | 62% | 2421 fps | 97.6% |
| Somchem S335 | <<locked>> | 80% | 34,737 psi | 56% | 2280 fps | 99.1% |
| Somchem S341 | <<locked>> | 82% | 36,114 psi | 58% | 2365 fps | 95% |
| Somchem S355 | <<locked>> | 88% | 34,316 psi | 55% | 2349 fps | 95.2% |
| Somchem S365 | <<locked>> | 96% | 31,676 psi | 51% | 2365 fps | 95.2% |
| Vihtavuori N120 | <<locked>> | 80% | 50,009 psi | 80% | 2451 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 40,437 psi | 65% | 2362 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 35,534 psi | 57% | 2287 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 80% | 30,487 psi | 49% | 2251 fps | 99.5% |
| Vihtavuori N140 | <<locked>> | 80% | 31,560 psi | 51% | 2254 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 86% | 30,632 psi | 49% | 2247 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 35,940 psi | 58% | 2343 fps | 96.7% |
| Vihtavuori N540 | <<locked>> | 80% | 30,313 psi | 49% | 2238 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 36,477 psi | 58% | 2369 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 34,751 psi | 56% | 2379 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 82% | 34,142 psi | 55% | 2349 fps | 95.2% |
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 90 powders for .375 H&H Mag. loaded with the .375 | 250gr | Lehigh Defense Controlled Fracturing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,779 fps; across all powders the maximum-charge window runs from 1,581 fps to 2,779 fps. Accurate 4064 gives the best case fill at 100 %, and 90 of the 90 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.375" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 4064, ADI AR 2208, Alliant Reloder- TS 15.5 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, Hodgdon CFE223 rank at the top here: for .375 H&H Mag. with the .375 | 250gr | Lehigh Defense Controlled Fracturing 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.