Load Specifications
Load data in caliber .375 H&H Mag. with .375 | 250gr | Hornady GMX bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon CFE223, Alliant Power Pro 1200-R and Alliant Power Pro 2000-MR.
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 1680 | <<locked>> | 82% | 55,332 psi | 89% | 2523 fps | 100% |
| Accurate 2015 | <<locked>> | 94% | 54,723 psi | 88% | 2589 fps | 100% |
| Accurate 2200 | <<locked>> | 86% | 56,289 psi | 90% | 2680 fps | 98.4% |
| Accurate 2230 | <<locked>> | 84% | 52,997 psi | 85% | 2635 fps | 98.2% |
| Accurate 2460 | <<locked>> | 90% | 53,417 psi | 86% | 2612 fps | 100% |
| Accurate 2495ᴾ | <<locked>> | 100% | 53,853 psi | 86% | 2635 fps | 100% |
| Accurate 2520 | <<locked>> | 94% | 54,636 psi | 88% | 2664 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 49,937 psi | 80% | 2618 fps | 100% |
| Accurate LT-30 | <<locked>> | 86% | 53,185 psi | 85% | 2507 fps | 100% |
| Accurate LT-32 | <<locked>> | 86% | 53,621 psi | 86% | 2526 fps | 100% |
| ADI AR 2206H | <<locked>> | 96% | 53,925 psi | 86% | 2661 fps | 98.7% |
| ADI AR 2207 | <<locked>> | 84% | 53,969 psi | 87% | 2526 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 51,590 psi | 83% | 2605 fps | 97.7% |
| ADI AR 2219 | <<locked>> | 88% | 56,333 psi | 90% | 2661 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 94% | 53,722 psi | 86% | 2628 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 96% | 55,709 psi | 89% | 2657 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 90% | 54,810 psi | 88% | 2723 fps | 99.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 53,548 psi | 86% | 2753 fps | 97.9% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 49,951 psi | 80% | 2621 fps | 98.9% |
| Alliant Reloder-10x | <<locked>> | 90% | 55,172 psi | 88% | 2602 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 54,505 psi | 87% | 2690 fps | 98.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 44,425 psi | 71% | 2605 fps | 97.4% |
| Alliant Reloder-7 | <<locked>> | 84% | 55,259 psi | 89% | 2546 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 55,230 psi | 89% | 2549 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 53,679 psi | 86% | 2674 fps | 97.8% |
| Bofors RP3ᴾ | <<locked>> | 100% | 49,705 psi | 80% | 2631 fps | 98.9% |
| Hodgdon Benchmark | <<locked>> | 94% | 56,289 psi | 90% | 2618 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 96% | 55,361 psi | 89% | 2700 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 92% | 53,766 psi | 86% | 2736 fps | 98.4% |
| Hodgdon H322 | <<locked>> | 90% | 54,418 psi | 87% | 2638 fps | 100% |
| Hodgdon H335 | <<locked>> | 90% | 55,666 psi | 89% | 2664 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 51,938 psi | 83% | 2638 fps | 96.7% |
| Hodgdon H4198 | <<locked>> | 84% | 55,172 psi | 88% | 2552 fps | 100% |
| Hodgdon H4895 | <<locked>> | 96% | 54,331 psi | 87% | 2674 fps | 99.2% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 56,275 psi | 90% | 2746 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,562 psi | 54% | 1555 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 56,159 psi | 90% | 2677 fps | 99.3% |
| IMR 3031 | <<locked>> | 98% | 56,275 psi | 90% | 2710 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 54,317 psi | 87% | 2635 fps | 98.4% |
| IMR 4198 | <<locked>> | 90% | 56,260 psi | 90% | 2569 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 55,840 psi | 90% | 2723 fps | 99.1% |
| IMR 8208 XBR | <<locked>> | 94% | 53,722 psi | 86% | 2628 fps | 99.4% |
| Lovex D073.4 | <<locked>> | 84% | 53,679 psi | 86% | 2621 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 90% | 53,505 psi | 86% | 2618 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 98% | 55,724 psi | 89% | 2690 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 55,071 psi | 88% | 2602 fps | 98.8% |
| Lovex S062ᴾ | <<locked>> | 100% | 53,287 psi | 85% | 2638 fps | 99.5% |
| Norma 200 | <<locked>> | 86% | 55,085 psi | 88% | 2579 fps | 100% |
| Norma 201 | <<locked>> | 98% | 55,796 psi | 89% | 2657 fps | 99.6% |
| Norma 202 | <<locked>> | 98% | 56,289 psi | 90% | 2671 fps | 100% |
| Norma 203Bᴾ | <<locked>> | 100% | 53,476 psi | 86% | 2677 fps | 98.7% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 54,099 psi | 87% | 2700 fps | 98.6% |
| Ramshot TAC | <<locked>> | 94% | 54,621 psi | 88% | 2635 fps | 96.5% |
| Ramshot Wild Boar | <<locked>> | 94% | 53,113 psi | 85% | 2654 fps | 98.6% |
| Ramshot X-Terminator | <<locked>> | 92% | 55,550 psi | 89% | 2635 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,779 psi | 54% | 1594 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 53,708 psi | 86% | 2621 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 98% | 54,070 psi | 87% | 2749 fps | 98.4% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 47,572 psi | 76% | 2677 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 94% | 53,345 psi | 86% | 2602 fps | 100% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 56,057 psi | 90% | 2651 fps | 99.6% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 46,195 psi | 74% | 2569 fps | 98.2% |
| Shooters World AR Plus | <<locked>> | 84% | 53,679 psi | 86% | 2621 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 98% | 55,724 psi | 89% | 2690 fps | 100% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 53,287 psi | 85% | 2638 fps | 99.5% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 54,041 psi | 87% | 2592 fps | 99.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 54,157 psi | 87% | 2290 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 53,011 psi | 85% | 2625 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 48,718 psi | 78% | 2628 fps | 97.8% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 56,362 psi | 90% | 2618 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 96% | 55,782 psi | 89% | 2657 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 98% | 55,941 psi | 90% | 2684 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 55,535 psi | 89% | 2572 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 51,097 psi | 82% | 2523 fps | 100% |
| Somchem S321 | <<locked>> | 92% | 54,839 psi | 88% | 2664 fps | 99.7% |
| Somchem S335 | <<locked>> | 96% | 53,969 psi | 87% | 2572 fps | 100% |
| Somchem S341 | <<locked>> | 96% | 55,056 psi | 88% | 2657 fps | 98.7% |
| Somchem S355ᴾ | <<locked>> | 100% | 47,326 psi | 76% | 2572 fps | 98.2% |
| Vihtavuori N120 | <<locked>> | 84% | 53,940 psi | 86% | 2480 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 55,434 psi | 89% | 2552 fps | 100% |
| Vihtavuori N133 | <<locked>> | 96% | 55,129 psi | 88% | 2562 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 54,389 psi | 87% | 2628 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 53,200 psi | 85% | 2602 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 45,818 psi | 73% | 2516 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 94% | 54,447 psi | 87% | 2631 fps | 99.5% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 54,810 psi | 88% | 2644 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 42,119 psi | 68% | 2454 fps | 96.7% |
| Winchester 748 | <<locked>> | 96% | 56,420 psi | 90% | 2720 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 98% | 55,376 psi | 89% | 2694 fps | 99.3% |
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 1680 | <<locked>> | 80% | 51,851 psi | 83% | 2477 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 35,244 psi | 57% | 2287 fps | 99.8% |
| Accurate 2200 | <<locked>> | 80% | 46,050 psi | 74% | 2520 fps | 96.5% |
| Accurate 2230 | <<locked>> | 80% | 45,876 psi | 74% | 2526 fps | 96.9% |
| Accurate 2460 | <<locked>> | 80% | 37,956 psi | 61% | 2365 fps | 98.7% |
| Accurate 2495 | <<locked>> | 80% | 27,224 psi | 44% | 2172 fps | 98.7% |
| Accurate 2520 | <<locked>> | 80% | 33,359 psi | 53% | 2310 fps | 97.3% |
| Accurate 4064 | <<locked>> | 80% | 25,817 psi | 41% | 2149 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 44,150 psi | 71% | 2375 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 44,512 psi | 71% | 2388 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 84% | 36,869 psi | 59% | 2365 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 47,703 psi | 76% | 2444 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 40,306 psi | 65% | 2415 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 42,902 psi | 69% | 2470 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 34,360 psi | 55% | 2290 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 32,576 psi | 52% | 2310 fps | 100% |
| Alliant Power Pro 1200-R | 53.5 gr | 80% | 39,233 psi | 63% | 2461 fps | 96.5% |
| Alliant Power Pro 2000-MR | 65.5 gr | 92% | 43,613 psi | 70% | 2579 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 33,910 psi | 54% | 2333 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 40,451 psi | 65% | 2388 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 39,537 psi | 63% | 2441 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 96% | 38,711 psi | 62% | 2490 fps | 95.6% |
| Alliant Reloder-7 | <<locked>> | 80% | 48,791 psi | 78% | 2461 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 42,772 psi | 69% | 2372 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 43,918 psi | 70% | 2516 fps | 95.7% |
| Bofors RP3 | <<locked>> | 90% | 35,186 psi | 56% | 2375 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,709 psi | 59% | 2297 fps | 97% |
| Hodgdon BL-C2 | <<locked>> | 80% | 31,778 psi | 51% | 2290 fps | 95.4% |
| Hodgdon CFE223 | 61.3 gr | 84% | 40,712 psi | 65% | 2513 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 80% | 38,986 psi | 63% | 2402 fps | 99.6% |
| Hodgdon H335 | <<locked>> | 80% | 39,610 psi | 64% | 2418 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 96% | 45,440 psi | 73% | 2536 fps | 95.3% |
| Hodgdon H4198 | <<locked>> | 80% | 48,718 psi | 78% | 2461 fps | 100% |
| Hodgdon H4895 | <<locked>> | 84% | 37,072 psi | 59% | 2379 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 35,288 psi | 57% | 2385 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,772 psi | 40% | 1388 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 35,955 psi | 58% | 2339 fps | 95.2% |
| IMR 3031 | <<locked>> | 80% | 31,024 psi | 50% | 2290 fps | 98.9% |
| IMR 4064 | <<locked>> | 90% | 39,711 psi | 64% | 2398 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 41,800 psi | 67% | 2369 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 37,956 psi | 61% | 2425 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 34,360 psi | 55% | 2290 fps | 95.6% |
| Lovex D073.4 | <<locked>> | 80% | 46,470 psi | 75% | 2516 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 37,652 psi | 60% | 2362 fps | 97.7% |
| Lovex D073.6 | <<locked>> | 80% | 29,849 psi | 48% | 2241 fps | 96.1% |
| Lovex S060 | <<locked>> | 84% | 38,305 psi | 61% | 2326 fps | 95.4% |
| Lovex S062 | <<locked>> | 84% | 32,213 psi | 52% | 2260 fps | 95% |
| Norma 200 | <<locked>> | 80% | 45,411 psi | 73% | 2448 fps | 100% |
| Norma 201 | <<locked>> | 82% | 33,765 psi | 54% | 2280 fps | 95.5% |
| Norma 202 | <<locked>> | 80% | 31,444 psi | 50% | 2247 fps | 97.3% |
| Norma 203B | <<locked>> | 90% | 38,740 psi | 62% | 2431 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 90% | 38,667 psi | 62% | 2441 fps | 95.1% |
| Ramshot TAC | <<locked>> | 90% | 47,805 psi | 77% | 2533 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 84% | 37,768 psi | 61% | 2395 fps | 95.2% |
| Ramshot X-Terminator | <<locked>> | 82% | 39,958 psi | 64% | 2382 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,903 psi | 40% | 1421 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 38,783 psi | 62% | 2379 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 41,147 psi | 66% | 2536 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 31,894 psi | 51% | 2339 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 34,867 psi | 56% | 2287 fps | 98% |
| Rottweil R 902 | <<locked>> | 84% | 34,084 psi | 55% | 2280 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 92% | 35,288 psi | 57% | 2369 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 80% | 46,470 psi | 75% | 2516 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 29,849 psi | 48% | 2241 fps | 96.1% |
| Shooters World Precision | <<locked>> | 84% | 32,213 psi | 52% | 2260 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 40,973 psi | 66% | 2388 fps | 97.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 48,747 psi | 78% | 2224 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 43,279 psi | 69% | 2474 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 40,001 psi | 64% | 2474 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 41,191 psi | 66% | 2402 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 45,208 psi | 72% | 2500 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 37,840 psi | 61% | 2385 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,649 psi | 54% | 2218 fps | 97.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,180 psi | 44% | 2090 fps | 96.8% |
| Somchem S321 | <<locked>> | 80% | 36,419 psi | 58% | 2359 fps | 96.7% |
| Somchem S335 | <<locked>> | 80% | 32,851 psi | 53% | 2221 fps | 98.4% |
| Somchem S341 | <<locked>> | 86% | 39,015 psi | 63% | 2402 fps | 95.5% |
| Somchem S355 | <<locked>> | 92% | 36,724 psi | 59% | 2382 fps | 95.6% |
| Vihtavuori N120 | <<locked>> | 80% | 47,718 psi | 77% | 2402 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 38,406 psi | 62% | 2306 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 33,620 psi | 54% | 2231 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 80% | 28,500 psi | 46% | 2192 fps | 98.9% |
| Vihtavuori N140 | <<locked>> | 80% | 29,718 psi | 48% | 2192 fps | 97.1% |
| Vihtavuori N150 | <<locked>> | 88% | 30,734 psi | 49% | 2231 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 34,055 psi | 55% | 2283 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 28,529 psi | 46% | 2175 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 39,305 psi | 63% | 2402 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 32,721 psi | 52% | 2310 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 86% | 36,738 psi | 59% | 2385 fps | 95.6% |
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 107 powders for .375 H&H Mag. loaded with the .375 | 250gr | Hornady GMX. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,753 fps; across all powders the maximum-charge window runs from 1,555 fps to 2,753 fps. Accurate 2495 gives the best case fill at 100 %, and 107 of the 107 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 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, Accurate 4350 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. Hodgdon CFE223, Alliant Power Pro 1200-R, Alliant Power Pro 2000-MR rank at the top here: for .375 H&H Mag. with the .375 | 250gr | Hornady GMX they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 4350, Alliant Reloder-16 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.