Load Specifications
Bullet Manufacturer:North Fork
Bullet Weight:300 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 | 300gr | NorthFork Bonded Core bullet and 106 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 60 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>> | 88% | 56,231 psi | 90% | 2372 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 54,607 psi | 88% | 2402 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 53,751 psi | 86% | 2392 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 56,347 psi | 90% | 2457 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 54,070 psi | 87% | 2388 fps | 96.4% |
| Accurate 4064 | <<locked>> | 94% | 53,577 psi | 86% | 2434 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,037 psi | 79% | 2451 fps | 98.9% |
| Accurate LT-30 | <<locked>> | 82% | 55,622 psi | 89% | 2323 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,043 psi | 90% | 2346 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,998 psi | 88% | 2464 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 55,825 psi | 90% | 2457 fps | 99.8% |
| ADI AR 2219 | <<locked>> | 82% | 56,376 psi | 90% | 2431 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,259 psi | 87% | 2421 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 54,679 psi | 88% | 2402 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 56,202 psi | 90% | 2513 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 54,360 psi | 87% | 2566 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 55,347 psi | 89% | 2477 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,115 psi | 90% | 2375 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 56,217 psi | 90% | 2500 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,341 psi | 78% | 2454 fps | 99.1% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 55,927 psi | 90% | 2585 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,229 psi | 55% | 2224 fps | 97.1% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,534 psi | 87% | 2323 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 54,694 psi | 88% | 2477 fps | 99.6% |
| Bofors RP3 | <<locked>> | 96% | 55,825 psi | 90% | 2493 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 53,040 psi | 85% | 2418 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 88% | 56,362 psi | 90% | 2405 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 53,098 psi | 85% | 2448 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 54,897 psi | 88% | 2533 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 55,114 psi | 88% | 2415 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 56,202 psi | 90% | 2444 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 53,592 psi | 86% | 2457 fps | 99.1% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 52,446 psi | 84% | 2497 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 98% | 53,722 psi | 86% | 2464 fps | 96% |
| Hodgdon H4895 | <<locked>> | 90% | 55,477 psi | 89% | 2470 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,367 psi | 71% | 2352 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,375 psi | 87% | 2500 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 53,548 psi | 86% | 2526 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,012 psi | 56% | 1447 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 53,461 psi | 86% | 2431 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 55,100 psi | 88% | 2454 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,550 psi | 89% | 2444 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,956 psi | 90% | 2428 fps | 97.6% |
| IMR 4198 | <<locked>> | 84% | 56,188 psi | 90% | 2336 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 49,632 psi | 80% | 2392 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,158 psi | 88% | 2448 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,644 psi | 75% | 2398 fps | 98.6% |
| IMR 4895 | <<locked>> | 92% | 54,128 psi | 87% | 2480 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 54,259 psi | 87% | 2421 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 54,447 psi | 87% | 2411 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,244 psi | 87% | 2441 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,056 psi | 88% | 2398 fps | 99.9% |
| Lovex S062 | <<locked>> | 94% | 54,955 psi | 88% | 2441 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 53,983 psi | 87% | 2441 fps | 98.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 51,198 psi | 82% | 2421 fps | 97.1% |
| Norma 201 | <<locked>> | 90% | 53,925 psi | 86% | 2415 fps | 100% |
| Norma 202 | <<locked>> | 90% | 54,201 psi | 87% | 2418 fps | 100% |
| Norma 203B | <<locked>> | 94% | 55,317 psi | 89% | 2487 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 48,617 psi | 78% | 2441 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 94% | 55,854 psi | 90% | 2513 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 47,776 psi | 77% | 2434 fps | 97.1% |
| Ramshot TAC | <<locked>> | 88% | 54,621 psi | 88% | 2438 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 88% | 53,882 psi | 86% | 2454 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,521 psi | 89% | 2428 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,505 psi | 57% | 1483 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 53,998 psi | 87% | 2405 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,143 psi | 87% | 2441 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 56,434 psi | 90% | 2559 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 55,738 psi | 89% | 2585 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,530 psi | 78% | 2467 fps | 98.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,385 psi | 79% | 2490 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 88% | 55,071 psi | 88% | 2398 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,201 psi | 87% | 2411 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 55,680 psi | 89% | 2484 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 53,040 psi | 85% | 2418 fps | 96.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 53,983 psi | 87% | 2441 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,244 psi | 87% | 2441 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 54,955 psi | 88% | 2441 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 51,198 psi | 82% | 2421 fps | 97.1% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 53,751 psi | 86% | 2382 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 53,925 psi | 86% | 2497 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 53,693 psi | 86% | 2356 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 52,808 psi | 85% | 2418 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 53,505 psi | 86% | 2441 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 55,825 psi | 90% | 2362 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 55,593 psi | 89% | 2362 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 54,520 psi | 87% | 2398 fps | 97.3% |
| Somchem S321 | <<locked>> | 86% | 55,506 psi | 89% | 2454 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,013 psi | 88% | 2362 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 55,927 psi | 90% | 2457 fps | 99.9% |
| Somchem S355 | <<locked>> | 98% | 56,043 psi | 90% | 2480 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,381 psi | 70% | 2398 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 86% | 55,738 psi | 89% | 2329 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,840 psi | 90% | 2349 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 53,447 psi | 86% | 2382 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 54,636 psi | 88% | 2398 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,288 psi | 87% | 2421 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,358 psi | 82% | 2441 fps | 99% |
| Vihtavuori N530 | <<locked>> | 88% | 54,824 psi | 88% | 2421 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 56,144 psi | 90% | 2438 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,256 psi | 81% | 2448 fps | 98.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,303 psi | 58% | 2287 fps | 97% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,243 psi | 84% | 2431 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 54,244 psi | 87% | 2464 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 52,678 psi | 84% | 2500 fps | 97.3% |
| Winchester StaBALL Match | <<locked>> | 90% | 52,953 psi | 85% | 2444 fps | 100% |
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% | 44,092 psi | 71% | 2221 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,921 psi | 77% | 2316 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,579 psi | 59% | 2152 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,946 psi | 69% | 2277 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 47,485 psi | 76% | 2297 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 34,592 psi | 55% | 2146 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 34,679 psi | 56% | 2208 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 52,199 psi | 84% | 2283 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,605 psi | 84% | 2303 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,437 psi | 65% | 2241 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 80% | 34,519 psi | 55% | 2113 fps | 96.1% |
| ADI AR 2219 | <<locked>> | 80% | 52,881 psi | 85% | 2388 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,424 psi | 68% | 2251 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 42,003 psi | 67% | 2244 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,356 psi | 79% | 2421 fps | 99.8% |
| Alliant Power Pro 2000-MR | 59.2 gr | 80% | 36,361 psi | 58% | 2254 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,707 psi | 54% | 2133 fps | 97.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,545 psi | 79% | 2297 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,303 psi | 58% | 2182 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 33,605 psi | 54% | 2175 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 82% | 31,009 psi | 50% | 2142 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 96% | 30,414 psi | 49% | 2133 fps | 95.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,184 psi | 82% | 2283 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,247 psi | 63% | 2241 fps | 97.1% |
| Bofors RP3 | <<locked>> | 80% | 33,011 psi | 53% | 2129 fps | 97.6% |
| Bofors RP7 | <<locked>> | 94% | 46,934 psi | 75% | 2326 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,353 psi | 71% | 2241 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,625 psi | 65% | 2267 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,614 psi | 72% | 2382 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 80% | 48,356 psi | 78% | 2329 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,139 psi | 79% | 2356 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 36,332 psi | 58% | 2178 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 94% | 43,091 psi | 69% | 2352 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 96% | 50,430 psi | 81% | 2418 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 40,756 psi | 65% | 2251 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 28,877 psi | 46% | 2044 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,593 psi | 59% | 2224 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 96% | 46,644 psi | 75% | 2421 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,005 psi | 42% | 1289 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,117 psi | 63% | 2208 fps | 98.5% |
| IMR 3031 | <<locked>> | 80% | 39,914 psi | 64% | 2247 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,172 psi | 58% | 2142 fps | 96.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 43,743 psi | 70% | 2247 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 50,009 psi | 80% | 2260 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 46,615 psi | 75% | 2346 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 46,122 psi | 74% | 2316 fps | 95.6% |
| IMR 4831 | <<locked>> | 90% | 33,779 psi | 54% | 2172 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 37,130 psi | 60% | 2208 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 80% | 42,424 psi | 68% | 2251 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 47,543 psi | 76% | 2320 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,001 psi | 63% | 2224 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 41,002 psi | 66% | 2188 fps | 98.5% |
| Lovex S062 | <<locked>> | 80% | 35,911 psi | 58% | 2146 fps | 98.5% |
| Lovex S065 | <<locked>> | 90% | 39,943 psi | 64% | 2221 fps | 95.6% |
| Lovex S070 | <<locked>> | 94% | 42,612 psi | 68% | 2287 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 39,668 psi | 64% | 2201 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 39,769 psi | 64% | 2211 fps | 100% |
| Norma 203B | <<locked>> | 80% | 35,665 psi | 57% | 2172 fps | 97.3% |
| Norma URP | <<locked>> | 90% | 35,563 psi | 57% | 2215 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 34,969 psi | 56% | 2182 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 96% | 42,192 psi | 68% | 2343 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 42,177 psi | 68% | 2247 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,452 psi | 66% | 2270 fps | 98.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,759 psi | 73% | 2290 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,353 psi | 42% | 1322 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,630 psi | 76% | 2320 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 42,061 psi | 67% | 2257 fps | 95.4% |
| ReloadSwiss RS 52 | 57.4 gr | 80% | 37,478 psi | 60% | 2264 fps | 97.3% |
| ReloadSwiss RS 60 | 58.3 gr | 80% | 30,893 psi | 50% | 2149 fps | 98.4% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 34,708 psi | 56% | 2224 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 37,884 psi | 61% | 2280 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 43,497 psi | 70% | 2238 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,768 psi | 61% | 2162 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 31,111 psi | 50% | 2083 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 94% | 46,934 psi | 75% | 2326 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 39,943 psi | 64% | 2221 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,001 psi | 63% | 2224 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 35,911 psi | 58% | 2146 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 94% | 42,612 psi | 68% | 2287 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,183 psi | 80% | 2336 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,140 psi | 52% | 2123 fps | 95.9% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,517 psi | 81% | 2316 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,263 psi | 65% | 2224 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,914 psi | 62% | 2215 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,278 psi | 66% | 2165 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,055 psi | 55% | 2054 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 44,788 psi | 72% | 2264 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 45,455 psi | 73% | 2316 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 40,756 psi | 65% | 2169 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,972 psi | 64% | 2224 fps | 98.2% |
| Somchem S355 | <<locked>> | 80% | 32,169 psi | 52% | 2090 fps | 96.7% |
| Somchem S365 | <<locked>> | 84% | 26,237 psi | 42% | 2028 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 46,760 psi | 75% | 2221 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,481 psi | 67% | 2162 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,941 psi | 59% | 2152 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,623 psi | 60% | 2156 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,487 psi | 49% | 2041 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 88% | 34,867 psi | 56% | 2169 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 42,409 psi | 68% | 2244 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 80% | 36,129 psi | 58% | 2149 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 34,214 psi | 55% | 2172 fps | 95% |
| Vihtavuori N555 | <<locked>> | 96% | 32,097 psi | 51% | 2195 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,066 psi | 47% | 2014 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 41,553 psi | 67% | 2283 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 43,294 psi | 69% | 2352 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,058 psi | 61% | 2215 fps | 98.4% |
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 106 powders for .375 H&H Mag. loaded with the .375 | 300gr | NorthFork Bonded Core. Alliant Reloder-17 delivers the highest muzzle velocity at 2,585 fps; across all powders the maximum-charge window runs from 1,447 fps to 2,585 fps. Accurate 4350 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 300.0 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 60, ReloadSwiss RS 52 rank at the top here: for .375 H&H Mag. with the .375 | 300gr | 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.