Load Specifications
Bullet Manufacturer:North Fork
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
Recommended Twist Rate:1:6.0
Load data in caliber .375 H&H Mag. with .375 | 270gr | NorthFork Bonded Core bullet and 101 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 ReloadSwiss RS 60.
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% | 54,375 psi | 87% | 2510 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 56,144 psi | 90% | 2575 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 54,984 psi | 88% | 2562 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 54,244 psi | 87% | 2589 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 55,695 psi | 89% | 2556 fps | 95.8% |
| Accurate 4064 | <<locked>> | 96% | 54,781 psi | 88% | 2605 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,673 psi | 75% | 2562 fps | 97.9% |
| Accurate LT-30 | <<locked>> | 82% | 54,041 psi | 87% | 2457 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,447 psi | 87% | 2477 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 53,171 psi | 85% | 2589 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 96% | 53,983 psi | 87% | 2585 fps | 99.2% |
| ADI AR 2219 | <<locked>> | 82% | 54,476 psi | 87% | 2566 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 55,840 psi | 90% | 2595 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 55,898 psi | 90% | 2575 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 53,998 psi | 87% | 2644 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 55,927 psi | 90% | 2743 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 53,432 psi | 86% | 2608 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 54,288 psi | 87% | 2513 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 54,085 psi | 87% | 2625 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,499 psi | 75% | 2569 fps | 98% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 53,693 psi | 86% | 2710 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 56,391 psi | 90% | 2497 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 56,376 psi | 90% | 2651 fps | 99.3% |
| Bofors RP3 | <<locked>> | 96% | 53,737 psi | 86% | 2621 fps | 99.9% |
| Bofors RP7ᴾ | <<locked>> | 100% | 54,563 psi | 87% | 2582 fps | 95.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 54,766 psi | 88% | 2539 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 54,636 psi | 88% | 2625 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 52,881 psi | 85% | 2661 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 84% | 53,258 psi | 85% | 2549 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 54,085 psi | 87% | 2572 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 55,129 psi | 88% | 2628 fps | 98.7% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 50,241 psi | 81% | 2608 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 90% | 53,606 psi | 86% | 2598 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,598 psi | 68% | 2461 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 55,782 psi | 89% | 2677 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,737 psi | 56% | 1542 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,129 psi | 88% | 2605 fps | 99.8% |
| IMR 3031 | <<locked>> | 92% | 56,405 psi | 90% | 2631 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 53,548 psi | 86% | 2569 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,259 psi | 87% | 2549 fps | 96.5% |
| IMR 4198 | <<locked>> | 84% | 54,607 psi | 88% | 2474 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 53,287 psi | 85% | 2566 fps | 96.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,744 psi | 72% | 2513 fps | 97.6% |
| IMR 4895 | <<locked>> | 94% | 55,405 psi | 89% | 2651 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 90% | 55,840 psi | 90% | 2595 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 56,217 psi | 90% | 2585 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 55,709 psi | 89% | 2615 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 53,403 psi | 86% | 2526 fps | 99.5% |
| Lovex S062 | <<locked>> | 96% | 56,391 psi | 90% | 2612 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,953 psi | 83% | 2556 fps | 97.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 49,255 psi | 79% | 2536 fps | 95.8% |
| Norma 201 | <<locked>> | 92% | 55,245 psi | 89% | 2585 fps | 100% |
| Norma 202 | <<locked>> | 92% | 55,695 psi | 89% | 2592 fps | 100% |
| Norma 203B | <<locked>> | 94% | 53,229 psi | 85% | 2612 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 46,615 psi | 75% | 2556 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 94% | 53,534 psi | 86% | 2635 fps | 99.5% |
| Ramshot TAC | <<locked>> | 88% | 52,953 psi | 85% | 2562 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,506 psi | 89% | 2628 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 86% | 53,635 psi | 86% | 2552 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,114 psi | 56% | 1581 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 55,608 psi | 89% | 2582 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 55,782 psi | 89% | 2612 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 54,143 psi | 87% | 2687 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 53,708 psi | 86% | 2717 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,398 psi | 74% | 2579 fps | 97.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,616 psi | 76% | 2598 fps | 97% |
| Rottweil R 901 | <<locked>> | 90% | 56,347 psi | 90% | 2572 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 55,709 psi | 89% | 2585 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 53,345 psi | 86% | 2608 fps | 99.8% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 54,563 psi | 87% | 2582 fps | 95.9% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,953 psi | 83% | 2556 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 92% | 55,709 psi | 89% | 2615 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 56,391 psi | 90% | 2612 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 49,255 psi | 79% | 2536 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,492 psi | 89% | 2556 fps | 99.9% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 54,897 psi | 88% | 2579 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 55,201 psi | 89% | 2667 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 55,129 psi | 88% | 2530 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,447 psi | 87% | 2589 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,027 psi | 88% | 2612 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,041 psi | 87% | 2493 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 53,664 psi | 86% | 2490 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 52,518 psi | 84% | 2513 fps | 96.1% |
| Somchem S321 | <<locked>> | 86% | 53,650 psi | 86% | 2582 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 56,420 psi | 90% | 2533 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 53,882 psi | 86% | 2582 fps | 99.5% |
| Somchem S355 | <<locked>> | 98% | 53,983 psi | 87% | 2608 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,553 psi | 67% | 2510 fps | 99.4% |
| Vihtavuori N130 | <<locked>> | 86% | 54,099 psi | 87% | 2467 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 54,012 psi | 87% | 2480 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 54,795 psi | 88% | 2552 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 56,173 psi | 90% | 2572 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,477 psi | 89% | 2589 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,182 psi | 79% | 2556 fps | 98.1% |
| Vihtavuori N530 | <<locked>> | 90% | 56,434 psi | 90% | 2595 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 54,215 psi | 87% | 2569 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 48,182 psi | 77% | 2562 fps | 97.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,343 psi | 81% | 2549 fps | 99.6% |
| Winchester 748 | <<locked>> | 90% | 55,753 psi | 89% | 2641 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 50,488 psi | 81% | 2612 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 92% | 54,534 psi | 87% | 2618 fps | 99.8% |
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% | 42,540 psi | 68% | 2343 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,006 psi | 74% | 2434 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,882 psi | 56% | 2264 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,263 psi | 66% | 2395 fps | 99.8% |
| Accurate 2700 | <<locked>> | 92% | 52,243 psi | 84% | 2507 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 32,996 psi | 53% | 2247 fps | 99.2% |
| Accurate 4350 | <<locked>> | 94% | 37,884 psi | 61% | 2408 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 50,676 psi | 81% | 2411 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,068 psi | 82% | 2434 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,957 psi | 62% | 2349 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 35,331 psi | 57% | 2260 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 50,981 psi | 82% | 2520 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,959 psi | 66% | 2362 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 80% | 40,118 psi | 64% | 2362 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,427 psi | 76% | 2543 fps | 99.3% |
| Alliant Power Pro 2000-MR | 63.9 gr | 82% | 37,507 psi | 60% | 2408 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,358 psi | 52% | 2234 fps | 96.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,993 psi | 77% | 2428 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,853 psi | 56% | 2283 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 92% | 36,564 psi | 59% | 2369 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 86% | 33,939 psi | 54% | 2339 fps | 96% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,763 psi | 80% | 2411 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,840 psi | 61% | 2346 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 31,502 psi | 51% | 2228 fps | 96.1% |
| Bofors RP7 | <<locked>> | 98% | 51,184 psi | 82% | 2533 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,975 psi | 69% | 2359 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,059 psi | 63% | 2379 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,888 psi | 69% | 2500 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 80% | 46,586 psi | 75% | 2457 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,384 psi | 76% | 2480 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 39,885 psi | 64% | 2382 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 98% | 47,123 psi | 76% | 2559 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 39,204 psi | 63% | 2359 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 31,415 psi | 50% | 2228 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,056 psi | 56% | 2326 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,846 psi | 41% | 1378 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,768 psi | 61% | 2316 fps | 97.4% |
| IMR 3031 | <<locked>> | 80% | 38,174 psi | 61% | 2365 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,795 psi | 56% | 2244 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 88% | 48,008 psi | 77% | 2454 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 48,646 psi | 78% | 2395 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 50,256 psi | 81% | 2520 fps | 95.5% |
| IMR 4831 | <<locked>> | 94% | 36,782 psi | 59% | 2365 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 35,621 psi | 57% | 2313 fps | 96.4% |
| IMR 8208 XBR | <<locked>> | 80% | 40,959 psi | 66% | 2362 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 45,905 psi | 74% | 2441 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 37,347 psi | 60% | 2333 fps | 99.3% |
| Lovex S060 | <<locked>> | 80% | 39,610 psi | 64% | 2300 fps | 97.4% |
| Lovex S062 | <<locked>> | 80% | 34,505 psi | 55% | 2251 fps | 97.4% |
| Lovex S065 | <<locked>> | 94% | 43,265 psi | 69% | 2418 fps | 95.5% |
| Lovex S070 | <<locked>> | 98% | 46,427 psi | 74% | 2490 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 38,159 psi | 61% | 2310 fps | 98.3% |
| Norma 202 | <<locked>> | 80% | 38,348 psi | 61% | 2326 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 34,214 psi | 55% | 2277 fps | 95.9% |
| Norma URP | <<locked>> | 94% | 38,653 psi | 62% | 2408 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 33,605 psi | 54% | 2280 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 40,857 psi | 66% | 2359 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,900 psi | 64% | 2379 fps | 97.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,222 psi | 71% | 2405 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,107 psi | 42% | 1411 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,847 psi | 74% | 2441 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 46,108 psi | 74% | 2464 fps | 95.4% |
| ReloadSwiss RS 52 | 60.4 gr | 80% | 35,882 psi | 58% | 2369 fps | 95.8% |
| ReloadSwiss RS 60 | 61.4 gr | 80% | 29,805 psi | 48% | 2244 fps | 96.8% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 37,927 psi | 61% | 2425 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 41,698 psi | 67% | 2490 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 42,032 psi | 67% | 2359 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 36,361 psi | 58% | 2267 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 80% | 29,776 psi | 48% | 2178 fps | 95% |
| Rottweil R 907 | <<locked>> | 98% | 51,184 psi | 82% | 2533 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 43,265 psi | 69% | 2418 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,347 psi | 60% | 2333 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 34,505 psi | 55% | 2251 fps | 97.4% |
| Shooters World SW4350 | <<locked>> | 98% | 46,427 psi | 74% | 2490 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,515 psi | 78% | 2457 fps | 99.5% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,343 psi | 82% | 2530 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 32,909 psi | 53% | 2270 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,675 psi | 78% | 2444 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,856 psi | 62% | 2333 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,449 psi | 60% | 2320 fps | 96.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,813 psi | 64% | 2280 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,750 psi | 53% | 2159 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 49,037 psi | 79% | 2467 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 43,961 psi | 70% | 2438 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 39,291 psi | 63% | 2283 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,580 psi | 62% | 2336 fps | 97.1% |
| Somchem S355 | <<locked>> | 80% | 30,806 psi | 49% | 2188 fps | 95.1% |
| Somchem S365 | <<locked>> | 88% | 28,529 psi | 46% | 2211 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 45,121 psi | 72% | 2346 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,958 psi | 64% | 2280 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,273 psi | 57% | 2260 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,216 psi | 58% | 2267 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 29,240 psi | 47% | 2136 fps | 96.1% |
| Vihtavuori N160 | <<locked>> | 92% | 38,130 psi | 61% | 2362 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 40,785 psi | 65% | 2359 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 80% | 34,766 psi | 56% | 2254 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 94% | 39,639 psi | 64% | 2415 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 31,908 psi | 51% | 2201 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 39,755 psi | 64% | 2395 fps | 99.2% |
| Winchester 760 | <<locked>> | 98% | 47,311 psi | 76% | 2562 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,622 psi | 59% | 2323 fps | 97.3% |
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 101 powders for .375 H&H Mag. loaded with the .375 | 270gr | NorthFork Bonded Core. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,743 fps; across all powders the maximum-charge window runs from 1,542 fps to 2,743 fps. Accurate 4350 gives the best case fill at 100 %, and 101 of the 101 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 270.0 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, ReloadSwiss RS 60 rank at the top here: for .375 H&H Mag. with the .375 | 270gr | NorthFork Bonded Core 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.