Load Specifications
Bullet Manufacturer:Woodleigh
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 | Woodleigh RN SN 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% | 53,911 psi | 86% | 2523 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,767 psi | 89% | 2592 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,187 psi | 88% | 2585 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 53,795 psi | 86% | 2602 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,114 psi | 88% | 2579 fps | 96.3% |
| Accurate 4064 | <<locked>> | 94% | 54,926 psi | 88% | 2625 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,633 psi | 81% | 2644 fps | 98.8% |
| Accurate LT-30 | <<locked>> | 82% | 56,246 psi | 90% | 2510 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 56,231 psi | 90% | 2657 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 53,853 psi | 86% | 2608 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,303 psi | 89% | 2612 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 55,709 psi | 89% | 2592 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 53,708 psi | 86% | 2664 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,695 psi | 89% | 2769 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 53,287 psi | 85% | 2628 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 53,679 psi | 86% | 2526 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 53,954 psi | 87% | 2648 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,385 psi | 79% | 2644 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 53,650 psi | 86% | 2736 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,128 psi | 56% | 2395 fps | 96.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,477 psi | 89% | 2510 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,999 psi | 90% | 2674 fps | 99.5% |
| Bofors RP3 | <<locked>> | 94% | 53,693 psi | 86% | 2644 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 54,288 psi | 87% | 2608 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,128 psi | 87% | 2556 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,418 psi | 87% | 2644 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,405 psi | 90% | 2733 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 56,202 psi | 90% | 2608 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 53,476 psi | 86% | 2589 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,042 psi | 88% | 2654 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,882 psi | 86% | 2694 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 98% | 55,056 psi | 88% | 2657 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 88% | 53,287 psi | 85% | 2621 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,513 psi | 73% | 2536 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,637 psi | 89% | 2697 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 55,216 psi | 89% | 2726 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,041 psi | 56% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,679 psi | 88% | 2625 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 56,304 psi | 90% | 2651 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,417 psi | 86% | 2595 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,751 psi | 86% | 2572 fps | 96.9% |
| IMR 4198 | <<locked>> | 82% | 53,896 psi | 86% | 2487 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,333 psi | 90% | 2638 fps | 97.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,935 psi | 77% | 2585 fps | 98.5% |
| IMR 4895 | <<locked>> | 92% | 55,288 psi | 89% | 2677 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 55,303 psi | 89% | 2612 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 55,651 psi | 89% | 2605 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,593 psi | 89% | 2638 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,159 psi | 90% | 2592 fps | 99.9% |
| Lovex S062 | <<locked>> | 94% | 56,159 psi | 90% | 2635 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,259 psi | 89% | 2631 fps | 98.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,533 psi | 84% | 2612 fps | 97% |
| Norma 201 | <<locked>> | 90% | 54,998 psi | 88% | 2608 fps | 100% |
| Norma 202 | <<locked>> | 90% | 55,492 psi | 89% | 2612 fps | 100% |
| Norma 203B | <<locked>> | 92% | 53,113 psi | 85% | 2635 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 50,038 psi | 80% | 2635 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 92% | 53,548 psi | 86% | 2661 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,153 psi | 79% | 2625 fps | 97% |
| Ramshot TAC | <<locked>> | 88% | 55,898 psi | 90% | 2635 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,143 psi | 88% | 2648 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 52,982 psi | 85% | 2569 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,433 psi | 57% | 1611 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,998 psi | 88% | 2598 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,434 psi | 89% | 2635 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,215 psi | 87% | 2710 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 53,577 psi | 86% | 2740 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,198 psi | 80% | 2664 fps | 98.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,734 psi | 81% | 2684 fps | 98.2% |
| Rottweil R 901 | <<locked>> | 88% | 55,999 psi | 90% | 2589 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,390 psi | 89% | 2605 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 53,330 psi | 86% | 2631 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 54,288 psi | 87% | 2608 fps | 96.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,259 psi | 89% | 2631 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,593 psi | 89% | 2638 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 56,159 psi | 90% | 2635 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,533 psi | 84% | 2612 fps | 97% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,665 psi | 88% | 2569 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,332 psi | 89% | 2690 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,520 psi | 87% | 2546 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 53,954 psi | 87% | 2608 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,665 psi | 88% | 2631 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 53,461 psi | 86% | 2510 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 53,243 psi | 85% | 2507 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,840 psi | 90% | 2589 fps | 97.2% |
| Somchem S321 | <<locked>> | 84% | 53,127 psi | 85% | 2598 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 56,043 psi | 90% | 2552 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 53,461 psi | 86% | 2602 fps | 99.7% |
| Somchem S355 | <<locked>> | 96% | 53,925 psi | 86% | 2631 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,614 psi | 72% | 2585 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 84% | 53,461 psi | 86% | 2480 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 53,563 psi | 86% | 2497 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,810 psi | 88% | 2572 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,985 psi | 90% | 2592 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,579 psi | 89% | 2615 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,779 psi | 85% | 2635 fps | 99% |
| Vihtavuori N530 | <<locked>> | 88% | 56,028 psi | 90% | 2615 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 54,027 psi | 87% | 2589 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,561 psi | 83% | 2635 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,463 psi | 60% | 2464 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,577 psi | 86% | 2621 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 55,405 psi | 89% | 2657 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 54,157 psi | 87% | 2697 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,331 psi | 87% | 2641 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% | 44,759 psi | 72% | 2395 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,747 psi | 78% | 2497 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,405 psi | 60% | 2323 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,903 psi | 70% | 2457 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 51,721 psi | 83% | 2530 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 35,389 psi | 57% | 2313 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 35,781 psi | 57% | 2382 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 52,924 psi | 85% | 2467 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,089 psi | 66% | 2415 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 35,041 psi | 56% | 2277 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,149 psi | 69% | 2425 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 42,844 psi | 69% | 2421 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,227 psi | 81% | 2612 fps | 99.8% |
| Alliant Power Pro 2000-MR | 66.1 gr | 80% | 37,173 psi | 60% | 2428 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,345 psi | 55% | 2297 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,444 psi | 81% | 2484 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,941 psi | 59% | 2349 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 90% | 36,550 psi | 59% | 2395 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 82% | 31,633 psi | 51% | 2306 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 32,967 psi | 53% | 2343 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,170 psi | 84% | 2467 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,176 psi | 64% | 2415 fps | 96.9% |
| Bofors RP3 | <<locked>> | 80% | 33,765 psi | 54% | 2297 fps | 97.3% |
| Bofors RP7 | <<locked>> | 94% | 48,080 psi | 77% | 2510 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,150 psi | 72% | 2421 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,611 psi | 67% | 2444 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,614 psi | 73% | 2569 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 49,400 psi | 79% | 2520 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,154 psi | 80% | 2543 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 37,188 psi | 60% | 2349 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 96% | 47,224 psi | 76% | 2585 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 96% | 51,808 psi | 83% | 2608 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 41,452 psi | 66% | 2425 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 31,328 psi | 50% | 2247 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,304 psi | 60% | 2395 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 98% | 51,430 psi | 82% | 2667 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,107 psi | 42% | 1404 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,842 psi | 64% | 2382 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 40,727 psi | 65% | 2425 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,753 psi | 59% | 2306 fps | 96.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 47,340 psi | 76% | 2470 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 50,807 psi | 81% | 2448 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 46,949 psi | 75% | 2493 fps | 95.3% |
| IMR 4831 | <<locked>> | 90% | 34,635 psi | 56% | 2339 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 37,811 psi | 61% | 2379 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 80% | 43,149 psi | 69% | 2425 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 48,689 psi | 78% | 2507 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,798 psi | 64% | 2398 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 41,713 psi | 67% | 2362 fps | 98.3% |
| Lovex S062 | <<locked>> | 80% | 36,637 psi | 59% | 2316 fps | 98.3% |
| Lovex S065 | <<locked>> | 90% | 40,785 psi | 65% | 2395 fps | 95.3% |
| Lovex S070 | <<locked>> | 96% | 46,369 psi | 74% | 2513 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 40,393 psi | 65% | 2375 fps | 99% |
| Norma 202 | <<locked>> | 80% | 40,466 psi | 65% | 2385 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,332 psi | 58% | 2339 fps | 97% |
| Norma URP | <<locked>> | 90% | 36,303 psi | 58% | 2385 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 35,781 psi | 57% | 2349 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 96% | 43,265 psi | 69% | 2523 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 43,076 psi | 69% | 2428 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,337 psi | 68% | 2444 fps | 98.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,601 psi | 75% | 2470 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,382 psi | 42% | 1437 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,515 psi | 78% | 2507 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 42,975 psi | 69% | 2434 fps | 95.1% |
| ReloadSwiss RS 52 | 64.1 gr | 80% | 38,377 psi | 62% | 2441 fps | 97% |
| ReloadSwiss RS 60 | 65.1 gr | 80% | 31,589 psi | 51% | 2316 fps | 98.1% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 38,218 psi | 61% | 2451 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,553 psi | 67% | 2516 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 44,193 psi | 71% | 2418 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,435 psi | 62% | 2329 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 31,850 psi | 51% | 2244 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 94% | 48,080 psi | 77% | 2510 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,785 psi | 65% | 2395 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,798 psi | 64% | 2398 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 36,637 psi | 59% | 2316 fps | 98.3% |
| Shooters World SW4350 | <<locked>> | 96% | 46,369 psi | 74% | 2513 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,213 psi | 82% | 2523 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,866 psi | 53% | 2290 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,343 psi | 82% | 2503 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,249 psi | 66% | 2402 fps | 96.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,726 psi | 64% | 2388 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,959 psi | 67% | 2339 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,693 psi | 56% | 2218 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 45,905 psi | 74% | 2444 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 46,528 psi | 75% | 2500 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 41,481 psi | 67% | 2343 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,944 psi | 66% | 2402 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 32,822 psi | 53% | 2254 fps | 96.4% |
| Somchem S365 | <<locked>> | 86% | 28,572 psi | 46% | 2234 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 47,485 psi | 76% | 2398 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,206 psi | 68% | 2336 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,681 psi | 60% | 2323 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,377 psi | 62% | 2329 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 31,154 psi | 50% | 2198 fps | 97.2% |
| Vihtavuori N160 | <<locked>> | 88% | 35,679 psi | 57% | 2336 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 43,149 psi | 69% | 2421 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 36,898 psi | 59% | 2316 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 37,347 psi | 60% | 2388 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 96% | 33,040 psi | 53% | 2365 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,662 psi | 51% | 2221 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 42,337 psi | 68% | 2461 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 47,413 psi | 76% | 2589 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,885 psi | 62% | 2388 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 | Woodleigh RN SN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,769 fps; across all powders the maximum-charge window runs from 1,572 fps to 2,769 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 | Woodleigh RN SN 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.