Load Specifications
Load data in caliber .375 H&H Mag. with .375 | 250gr | Barnes X S 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 LEVERevolution.
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>> | 88% | 54,259 psi | 87% | 2582 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 56,202 psi | 90% | 2651 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 55,738 psi | 89% | 2648 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 53,824 psi | 86% | 2657 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 55,027 psi | 88% | 2684 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,354 psi | 74% | 2621 fps | 96.8% |
| Accurate LT-30 | <<locked>> | 82% | 53,316 psi | 85% | 2523 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 53,708 psi | 86% | 2543 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 56,072 psi | 90% | 2703 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 98% | 56,434 psi | 90% | 2690 fps | 98.9% |
| ADI AR 2219 | <<locked>> | 82% | 53,896 psi | 86% | 2638 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 55,187 psi | 88% | 2661 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 90% | 54,897 psi | 88% | 2651 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 53,563 psi | 86% | 2713 fps | 99.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 54,882 psi | 88% | 2795 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 55,811 psi | 89% | 2717 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 84% | 53,969 psi | 87% | 2589 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 53,635 psi | 86% | 2687 fps | 98.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,035 psi | 74% | 2618 fps | 96.7% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 52,852 psi | 85% | 2769 fps | 99.4% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 55,680 psi | 89% | 2566 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 55,259 psi | 89% | 2710 fps | 98.5% |
| Bofors RP3 | <<locked>> | 96% | 53,301 psi | 85% | 2687 fps | 99.6% |
| Hodgdon Benchmark | <<locked>> | 88% | 54,317 psi | 87% | 2605 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 90% | 53,940 psi | 86% | 2690 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 88% | 55,390 psi | 89% | 2776 fps | 99% |
| Hodgdon H322 | <<locked>> | 86% | 55,985 psi | 90% | 2667 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 53,476 psi | 86% | 2644 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 54,447 psi | 87% | 2690 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 90% | 53,243 psi | 85% | 2667 fps | 99.3% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,540 psi | 68% | 2520 fps | 97.5% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 54,563 psi | 87% | 2740 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,012 psi | 56% | 1594 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 54,172 psi | 87% | 2664 fps | 99.4% |
| IMR 3031 | <<locked>> | 92% | 55,492 psi | 89% | 2707 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 56,159 psi | 90% | 2677 fps | 99% |
| IMR 4198 | <<locked>> | 84% | 53,882 psi | 86% | 2546 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,396 psi | 71% | 2572 fps | 96.4% |
| IMR 4895 | <<locked>> | 94% | 54,882 psi | 88% | 2720 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 90% | 55,187 psi | 88% | 2661 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 86% | 55,999 psi | 90% | 2657 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 55,376 psi | 89% | 2690 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 55,985 psi | 90% | 2635 fps | 99.3% |
| Lovex S062 | <<locked>> | 96% | 56,043 psi | 90% | 2684 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,851 psi | 83% | 2621 fps | 96.3% |
| Norma 201 | <<locked>> | 92% | 55,230 psi | 89% | 2657 fps | 99.8% |
| Norma 202 | <<locked>> | 92% | 55,201 psi | 89% | 2664 fps | 100% |
| Norma 203B | <<locked>> | 96% | 55,912 psi | 90% | 2723 fps | 99.3% |
| Norma URPᴾ | <<locked>> | 100% | 46,108 psi | 74% | 2612 fps | 96.5% |
| Ramshot Big Game | <<locked>> | 96% | 56,173 psi | 90% | 2749 fps | 99.2% |
| Ramshot TAC | <<locked>> | 90% | 55,753 psi | 89% | 2671 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 90% | 54,839 psi | 88% | 2694 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 86% | 53,272 psi | 85% | 2615 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,491 psi | 57% | 1637 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 54,984 psi | 88% | 2651 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 55,071 psi | 88% | 2667 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 52,910 psi | 85% | 2746 fps | 98.6% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 56,260 psi | 90% | 2828 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,948 psi | 74% | 2635 fps | 96.2% |
| Rottweil R 901 | <<locked>> | 88% | 53,940 psi | 86% | 2608 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 55,680 psi | 89% | 2654 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 56,144 psi | 90% | 2720 fps | 99.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,851 psi | 83% | 2621 fps | 96.3% |
| Shooters World Match Rifle | <<locked>> | 92% | 55,376 psi | 89% | 2690 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 56,043 psi | 90% | 2684 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 54,969 psi | 88% | 2618 fps | 99.6% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 54,360 psi | 87% | 2648 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 54,201 psi | 87% | 2726 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 54,520 psi | 87% | 2605 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 53,983 psi | 87% | 2648 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 54,114 psi | 87% | 2674 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 53,940 psi | 86% | 2566 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 56,086 psi | 90% | 2598 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 53,084 psi | 85% | 2648 fps | 99.7% |
| Somchem S335 | <<locked>> | 92% | 56,188 psi | 90% | 2605 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 53,200 psi | 85% | 2644 fps | 98.9% |
| Somchem S355 | <<locked>> | 98% | 53,447 psi | 86% | 2674 fps | 99.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,423 psi | 66% | 2569 fps | 98.6% |
| Vihtavuori N130 | <<locked>> | 86% | 53,693 psi | 86% | 2539 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 53,621 psi | 86% | 2552 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 54,244 psi | 87% | 2628 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 55,521 psi | 89% | 2641 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 54,723 psi | 88% | 2654 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,515 psi | 78% | 2612 fps | 96.9% |
| Vihtavuori N530 | <<locked>> | 90% | 55,825 psi | 90% | 2661 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 94% | 53,722 psi | 86% | 2641 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,601 psi | 76% | 2618 fps | 96.6% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,661 psi | 80% | 2602 fps | 98.9% |
| Winchester 748 | <<locked>> | 90% | 54,679 psi | 88% | 2707 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 92% | 53,780 psi | 86% | 2684 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% | 43,192 psi | 69% | 2418 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,659 psi | 75% | 2510 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 36,666 psi | 59% | 2352 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,655 psi | 67% | 2464 fps | 99.4% |
| Accurate 4064 | <<locked>> | 80% | 34,606 psi | 55% | 2333 fps | 98.9% |
| Accurate 4350 | <<locked>> | 96% | 40,698 psi | 65% | 2520 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 50,343 psi | 81% | 2480 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 50,647 psi | 81% | 2500 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,436 psi | 63% | 2418 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 86% | 40,016 psi | 64% | 2415 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 50,604 psi | 81% | 2592 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,162 psi | 66% | 2431 fps | 98% |
| Alliant AR-Comp | <<locked>> | 80% | 40,132 psi | 64% | 2441 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,253 psi | 76% | 2612 fps | 98.7% |
| Alliant Power Pro 2000-MR | 64.6 gr | 84% | 40,045 psi | 64% | 2520 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,851 psi | 53% | 2300 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,153 psi | 77% | 2507 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 37,579 psi | 60% | 2402 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 96% | 41,147 psi | 66% | 2523 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 88% | 36,535 psi | 59% | 2451 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,313 psi | 79% | 2480 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 40,350 psi | 65% | 2457 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 32,547 psi | 52% | 2303 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,134 psi | 69% | 2425 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,508 psi | 63% | 2448 fps | 98.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,656 psi | 68% | 2559 fps | 96.6% |
| Hodgdon H322 | <<locked>> | 80% | 46,398 psi | 74% | 2526 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,050 psi | 75% | 2549 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 42,598 psi | 68% | 2493 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 39,653 psi | 64% | 2431 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 35,810 psi | 57% | 2379 fps | 95.4% |
| Hodgdon LEVERevolution | 60.4 gr | 80% | 35,549 psi | 57% | 2392 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,310 psi | 42% | 1427 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,971 psi | 61% | 2382 fps | 96.5% |
| IMR 3031 | <<locked>> | 80% | 38,348 psi | 61% | 2434 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 37,391 psi | 60% | 2352 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 48,109 psi | 77% | 2467 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 41,640 psi | 67% | 2520 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 36,187 psi | 58% | 2382 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 41,162 psi | 66% | 2431 fps | 98% |
| Lovex D073.5 | <<locked>> | 80% | 46,369 psi | 74% | 2513 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 37,927 psi | 61% | 2405 fps | 98.8% |
| Lovex S060 | <<locked>> | 80% | 39,885 psi | 64% | 2362 fps | 96.5% |
| Lovex S062 | <<locked>> | 80% | 35,331 psi | 57% | 2320 fps | 96.6% |
| Lovex S065 | <<locked>> | 96% | 46,108 psi | 74% | 2526 fps | 95% |
| Norma 201 | <<locked>> | 80% | 39,073 psi | 63% | 2385 fps | 97.6% |
| Norma 202 | <<locked>> | 80% | 38,638 psi | 62% | 2395 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 36,912 psi | 59% | 2388 fps | 95.6% |
| Norma URP | <<locked>> | 96% | 41,089 psi | 66% | 2516 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 84% | 38,493 psi | 62% | 2444 fps | 95.7% |
| Ramshot TAC | <<locked>> | 84% | 46,354 psi | 74% | 2520 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,929 psi | 64% | 2441 fps | 96.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,440 psi | 71% | 2470 fps | 97.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,484 psi | 42% | 1460 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,876 psi | 74% | 2510 fps | 99.6% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 51,779 psi | 83% | 2618 fps | 95.5% |
| ReloadSwiss RS 52 | 61.2 gr | 82% | 38,580 psi | 62% | 2487 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 30,487 psi | 49% | 2303 fps | 95.5% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 43,207 psi | 69% | 2585 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 43,221 psi | 69% | 2438 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 37,376 psi | 60% | 2343 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 84% | 34,737 psi | 56% | 2346 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 96% | 46,108 psi | 74% | 2526 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,927 psi | 61% | 2405 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 35,331 psi | 57% | 2320 fps | 96.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,472 psi | 78% | 2523 fps | 98.9% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 50,952 psi | 82% | 2598 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 37,623 psi | 60% | 2431 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,356 psi | 78% | 2516 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 44,599 psi | 72% | 2497 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,811 psi | 61% | 2385 fps | 95.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,248 psi | 65% | 2346 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,257 psi | 53% | 2224 fps | 99% |
| Somchem S321 | <<locked>> | 80% | 44,121 psi | 71% | 2503 fps | 98.8% |
| Somchem S335 | <<locked>> | 80% | 39,958 psi | 64% | 2356 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 38,696 psi | 62% | 2398 fps | 96% |
| Somchem S355 | <<locked>> | 82% | 33,649 psi | 54% | 2306 fps | 95% |
| Somchem S365 | <<locked>> | 90% | 31,183 psi | 50% | 2326 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 45,310 psi | 73% | 2418 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,147 psi | 64% | 2349 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,868 psi | 58% | 2336 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,651 psi | 59% | 2336 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 80% | 30,095 psi | 48% | 2205 fps | 95.2% |
| Vihtavuori N160 | <<locked>> | 96% | 43,004 psi | 69% | 2516 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 41,031 psi | 66% | 2425 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 80% | 35,230 psi | 56% | 2323 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 96% | 42,148 psi | 68% | 2523 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 36,593 psi | 59% | 2359 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 39,914 psi | 64% | 2464 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,854 psi | 59% | 2385 fps | 96.2% |
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 | Barnes X S. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,828 fps; across all powders the maximum-charge window runs from 1,594 fps to 2,828 fps. Accurate 4350 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 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 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, Hodgdon LEVERevolution rank at the top here: for .375 H&H Mag. with the .375 | 250gr | Barnes X S 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.