Load Specifications
Bullet Manufacturer:Hornady
Bullet Weight:270 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:.375 H&H Mag. load data
Case Length (l3):2.859"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:95.3 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Load data in caliber .375 H&H Mag. with .375 | 270gr | Hornady InterLock RN bullet and 103 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.
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>> | 86% | 53,838 psi | 86% | 2520 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,666 psi | 89% | 2589 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,853 psi | 88% | 2579 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 53,708 psi | 86% | 2602 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,114 psi | 88% | 2575 fps | 96.2% |
| Accurate 4064 | <<locked>> | 94% | 54,810 psi | 88% | 2621 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,372 psi | 81% | 2638 fps | 98.8% |
| Accurate LT-30 | <<locked>> | 82% | 56,144 psi | 90% | 2507 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,927 psi | 90% | 2651 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 53,577 psi | 86% | 2602 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,274 psi | 89% | 2612 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 55,593 psi | 89% | 2589 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 53,621 psi | 86% | 2661 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,405 psi | 89% | 2762 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 53,011 psi | 85% | 2621 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 53,548 psi | 86% | 2523 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 53,911 psi | 86% | 2644 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,356 psi | 79% | 2644 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 53,388 psi | 86% | 2730 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,925 psi | 56% | 2388 fps | 96.7% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,434 psi | 89% | 2507 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,709 psi | 89% | 2667 fps | 99.4% |
| Bofors RP3 | <<locked>> | 94% | 53,447 psi | 86% | 2638 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 54,012 psi | 87% | 2602 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 53,853 psi | 86% | 2549 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,172 psi | 87% | 2638 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,057 psi | 90% | 2730 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 84% | 55,883 psi | 90% | 2605 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 53,417 psi | 86% | 2585 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,766 psi | 88% | 2648 fps | 98.9% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,621 psi | 86% | 2687 fps | 97% |
| Hodgdon H4350 | <<locked>> | 98% | 54,781 psi | 88% | 2651 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 88% | 53,171 psi | 85% | 2618 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,310 psi | 73% | 2530 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,579 psi | 89% | 2694 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 54,940 psi | 88% | 2723 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,012 psi | 56% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,418 psi | 87% | 2618 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 56,159 psi | 90% | 2648 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,156 psi | 85% | 2589 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,490 psi | 86% | 2566 fps | 96.8% |
| IMR 4198 | <<locked>> | 82% | 53,708 psi | 86% | 2484 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,057 psi | 90% | 2635 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,906 psi | 77% | 2585 fps | 98.5% |
| IMR 4895 | <<locked>> | 92% | 55,245 psi | 89% | 2674 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 55,274 psi | 89% | 2612 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 55,376 psi | 89% | 2598 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,521 psi | 89% | 2635 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,072 psi | 90% | 2589 fps | 99.9% |
| Lovex S062 | <<locked>> | 94% | 56,115 psi | 90% | 2631 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,056 psi | 88% | 2628 fps | 98.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,272 psi | 84% | 2608 fps | 96.9% |
| Norma 201 | <<locked>> | 90% | 54,723 psi | 88% | 2602 fps | 100% |
| Norma 202 | <<locked>> | 90% | 55,172 psi | 88% | 2605 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,333 psi | 90% | 2677 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 49,748 psi | 80% | 2628 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 92% | 53,258 psi | 85% | 2654 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,965 psi | 79% | 2621 fps | 96.9% |
| Ramshot TAC | <<locked>> | 88% | 55,608 psi | 89% | 2628 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,042 psi | 88% | 2648 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,318 psi | 90% | 2612 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,404 psi | 57% | 1608 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,926 psi | 88% | 2595 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,448 psi | 89% | 2631 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 53,867 psi | 86% | 2703 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 53,316 psi | 85% | 2736 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,951 psi | 80% | 2657 fps | 98.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,531 psi | 81% | 2677 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 88% | 55,883 psi | 90% | 2589 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,114 psi | 88% | 2598 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 53,301 psi | 85% | 2628 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 54,012 psi | 87% | 2602 fps | 96.3% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,056 psi | 88% | 2628 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,521 psi | 89% | 2635 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 56,115 psi | 90% | 2631 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,272 psi | 84% | 2608 fps | 96.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,607 psi | 88% | 2569 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,042 psi | 88% | 2687 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,346 psi | 87% | 2543 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 53,722 psi | 86% | 2602 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,360 psi | 87% | 2628 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 53,403 psi | 86% | 2507 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,347 psi | 90% | 2543 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,637 psi | 89% | 2582 fps | 97.1% |
| Somchem S321 | <<locked>> | 84% | 52,794 psi | 85% | 2595 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,782 psi | 89% | 2546 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 53,359 psi | 86% | 2598 fps | 99.7% |
| Somchem S355 | <<locked>> | 96% | 53,896 psi | 86% | 2628 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,367 psi | 71% | 2582 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 84% | 53,345 psi | 86% | 2477 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 53,505 psi | 86% | 2493 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,491 psi | 87% | 2569 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,680 psi | 89% | 2585 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,274 psi | 89% | 2608 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,489 psi | 84% | 2628 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 88% | 55,753 psi | 89% | 2608 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 53,722 psi | 86% | 2582 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,314 psi | 82% | 2631 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,391 psi | 60% | 2461 fps | 96.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,185 psi | 85% | 2615 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 55,317 psi | 89% | 2657 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,896 psi | 86% | 2690 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,056 psi | 87% | 2635 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% | 44,628 psi | 72% | 2395 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,660 psi | 78% | 2493 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,289 psi | 60% | 2320 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,816 psi | 70% | 2454 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 51,634 psi | 83% | 2526 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 35,244 psi | 57% | 2310 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 35,505 psi | 57% | 2375 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 52,823 psi | 85% | 2464 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,017 psi | 66% | 2411 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 80% | 34,969 psi | 56% | 2274 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,047 psi | 69% | 2421 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 42,656 psi | 68% | 2418 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,067 psi | 80% | 2608 fps | 99.7% |
| Alliant Power Pro 2000-MR | 65.8 gr | 80% | 36,956 psi | 59% | 2421 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,214 psi | 55% | 2290 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,328 psi | 81% | 2480 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,840 psi | 59% | 2346 fps | 96.5% |
| Alliant Reloder-16 | <<locked>> | 90% | 36,332 psi | 58% | 2388 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 82% | 31,560 psi | 51% | 2303 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 32,909 psi | 53% | 2339 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,938 psi | 83% | 2464 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,943 psi | 64% | 2411 fps | 96.8% |
| Bofors RP3 | <<locked>> | 80% | 33,649 psi | 54% | 2293 fps | 97.2% |
| Bofors RP7 | <<locked>> | 96% | 50,807 psi | 81% | 2556 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,049 psi | 72% | 2418 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,350 psi | 66% | 2438 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,498 psi | 73% | 2566 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 49,110 psi | 79% | 2513 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,835 psi | 80% | 2536 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 36,941 psi | 59% | 2343 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 96% | 47,007 psi | 75% | 2582 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 96% | 51,576 psi | 83% | 2602 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 41,321 psi | 66% | 2421 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 31,270 psi | 50% | 2244 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,231 psi | 60% | 2392 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 98% | 51,242 psi | 82% | 2664 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,049 psi | 42% | 1401 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,769 psi | 64% | 2379 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 40,553 psi | 65% | 2421 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,680 psi | 59% | 2303 fps | 96.5% |
| IMR 4166 Enduron | <<locked>> | 86% | 47,311 psi | 76% | 2470 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 50,662 psi | 81% | 2444 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 46,717 psi | 75% | 2490 fps | 95.2% |
| IMR 4831 | <<locked>> | 90% | 34,592 psi | 55% | 2339 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 37,681 psi | 60% | 2375 fps | 97.4% |
| IMR 8208 XBR | <<locked>> | 80% | 43,047 psi | 69% | 2421 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 48,399 psi | 78% | 2500 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,711 psi | 64% | 2395 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 41,408 psi | 66% | 2356 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 36,419 psi | 58% | 2310 fps | 98.2% |
| Lovex S065 | <<locked>> | 90% | 40,567 psi | 65% | 2392 fps | 95.2% |
| Lovex S070 | <<locked>> | 96% | 46,296 psi | 74% | 2513 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 40,292 psi | 65% | 2372 fps | 99% |
| Norma 202 | <<locked>> | 80% | 40,379 psi | 65% | 2382 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,230 psi | 58% | 2339 fps | 97% |
| Norma URP | <<locked>> | 90% | 36,245 psi | 58% | 2379 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 35,520 psi | 57% | 2346 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 96% | 43,047 psi | 69% | 2516 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 42,989 psi | 69% | 2425 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,090 psi | 67% | 2441 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,557 psi | 75% | 2467 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,324 psi | 42% | 1434 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,254 psi | 77% | 2500 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 42,728 psi | 69% | 2428 fps | 95% |
| ReloadSwiss RS 52 | 63.8 gr | 80% | 38,130 psi | 61% | 2434 fps | 96.9% |
| ReloadSwiss RS 60 | 64.8 gr | 80% | 31,401 psi | 50% | 2310 fps | 98% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 38,000 psi | 61% | 2448 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,379 psi | 66% | 2510 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 44,092 psi | 71% | 2411 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,319 psi | 61% | 2326 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 31,604 psi | 51% | 2238 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 96% | 50,807 psi | 81% | 2556 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,567 psi | 65% | 2392 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,711 psi | 64% | 2395 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 36,419 psi | 58% | 2310 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 96% | 46,296 psi | 74% | 2513 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,894 psi | 82% | 2516 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,677 psi | 52% | 2283 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,227 psi | 82% | 2500 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,973 psi | 66% | 2395 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,479 psi | 63% | 2382 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,858 psi | 67% | 2336 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,577 psi | 55% | 2211 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 45,701 psi | 73% | 2438 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 46,238 psi | 74% | 2493 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 41,350 psi | 66% | 2339 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,683 psi | 65% | 2395 fps | 97.9% |
| Somchem S355 | <<locked>> | 80% | 32,735 psi | 52% | 2251 fps | 96.3% |
| Somchem S365 | <<locked>> | 86% | 28,500 psi | 46% | 2231 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 47,355 psi | 76% | 2398 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,076 psi | 67% | 2333 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,507 psi | 60% | 2320 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,130 psi | 61% | 2323 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 30,951 psi | 50% | 2192 fps | 97.2% |
| Vihtavuori N160 | <<locked>> | 88% | 35,636 psi | 57% | 2333 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 43,091 psi | 69% | 2418 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 36,782 psi | 59% | 2313 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 37,304 psi | 60% | 2385 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 96% | 32,822 psi | 53% | 2359 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,488 psi | 50% | 2215 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 42,250 psi | 68% | 2457 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 47,224 psi | 76% | 2585 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,827 psi | 62% | 2385 fps | 98.2% |
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 103 powders for .375 H&H Mag. loaded with the .375 | 270gr | Hornady InterLock RN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,762 fps; across all powders the maximum-charge window runs from 1,572 fps to 2,762 fps. Accurate 4350 gives the best case fill at 100 %, and 103 of the 103 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-23 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 H&H Mag. with the .375 | 270gr | Hornady InterLock RN 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.