Load Specifications
Load data in caliber .375 H&H Mag. with .375 | 300gr | Hornady InterLock RN bullet and 102 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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>> | 84% | 53,301 psi | 85% | 2369 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,911 psi | 88% | 2434 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,897 psi | 88% | 2431 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,316 psi | 85% | 2448 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,375 psi | 87% | 2434 fps | 97.2% |
| Accurate 4064 | <<locked>> | 92% | 54,868 psi | 88% | 2474 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,172 psi | 87% | 2549 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 88% | 55,709 psi | 89% | 2503 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 53,142 psi | 85% | 2457 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,810 psi | 88% | 2461 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,506 psi | 89% | 2434 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,071 psi | 88% | 2612 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 56,405 psi | 90% | 2513 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,304 psi | 90% | 2520 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,362 psi | 90% | 2408 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,679 psi | 86% | 2497 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,228 psi | 84% | 2549 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,301 psi | 85% | 2585 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,333 psi | 60% | 2323 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,176 psi | 66% | 2457 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,317 psi | 89% | 2520 fps | 99.8% |
| Bofors RP3 | <<locked>> | 92% | 53,287 psi | 85% | 2490 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 53,635 psi | 86% | 2464 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 53,272 psi | 85% | 2398 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,882 psi | 86% | 2490 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,898 psi | 90% | 2579 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 55,448 psi | 89% | 2448 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,549 psi | 87% | 2507 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 98% | 53,592 psi | 86% | 2549 fps | 98% |
| Hodgdon H4350 | <<locked>> | 96% | 54,723 psi | 88% | 2516 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 88% | 56,231 psi | 90% | 2513 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,428 psi | 78% | 2441 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,317 psi | 89% | 2543 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,433 psi | 87% | 2582 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,404 psi | 57% | 1483 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,070 psi | 87% | 2470 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,956 psi | 90% | 2490 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,956 psi | 90% | 2487 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,159 psi | 90% | 2470 fps | 98.2% |
| IMR 4198 | <<locked>> | 82% | 56,318 psi | 90% | 2365 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,722 psi | 86% | 2487 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,608 psi | 89% | 2493 fps | 98.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,227 psi | 82% | 2493 fps | 99.5% |
| IMR 4895 | <<locked>> | 90% | 55,027 psi | 88% | 2523 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 54,810 psi | 88% | 2461 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,998 psi | 88% | 2448 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,259 psi | 89% | 2480 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,419 psi | 89% | 2438 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 55,796 psi | 89% | 2484 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,868 psi | 88% | 2487 fps | 99% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,651 psi | 89% | 2516 fps | 98.4% |
| Norma 201 | <<locked>> | 88% | 54,331 psi | 87% | 2454 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,911 psi | 88% | 2454 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,260 psi | 90% | 2533 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 54,157 psi | 87% | 2530 fps | 96.1% |
| Norma URPᴾ | <<locked>> | 100% | 53,374 psi | 86% | 2539 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 90% | 53,156 psi | 85% | 2510 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,011 psi | 83% | 2533 fps | 98.5% |
| Ramshot TAC | <<locked>> | 86% | 54,897 psi | 88% | 2480 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,491 psi | 87% | 2497 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,608 psi | 89% | 2461 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,897 psi | 58% | 1519 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,317 psi | 87% | 2441 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,998 psi | 88% | 2490 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,780 psi | 86% | 2552 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,084 psi | 85% | 2585 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,722 psi | 86% | 2569 fps | 99.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,737 psi | 86% | 2595 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 86% | 55,419 psi | 89% | 2434 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,998 psi | 88% | 2454 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 53,171 psi | 85% | 2484 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 53,635 psi | 86% | 2464 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,868 psi | 88% | 2487 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,259 psi | 89% | 2480 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,796 psi | 89% | 2484 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,651 psi | 89% | 2516 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,955 psi | 88% | 2539 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,330 psi | 86% | 2461 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,911 psi | 86% | 2477 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 56,173 psi | 90% | 2398 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,956 psi | 90% | 2395 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,172 psi | 88% | 2444 fps | 98% |
| Somchem S321 | <<locked>> | 84% | 55,985 psi | 90% | 2490 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,245 psi | 89% | 2395 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 52,881 psi | 85% | 2451 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 53,577 psi | 86% | 2480 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,761 psi | 77% | 2497 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 55,825 psi | 90% | 2362 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,333 psi | 90% | 2382 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,433 psi | 87% | 2418 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,245 psi | 89% | 2434 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,042 psi | 88% | 2464 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 56,057 psi | 90% | 2536 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 86% | 55,274 psi | 89% | 2461 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 53,345 psi | 86% | 2434 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,839 psi | 88% | 2539 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,277 psi | 65% | 2388 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 52,852 psi | 85% | 2474 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,984 psi | 88% | 2503 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,809 psi | 86% | 2549 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,185 psi | 53% | 2316 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,824 psi | 86% | 2487 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% | 47,282 psi | 76% | 2290 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,561 psi | 83% | 2392 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,885 psi | 64% | 2228 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,543 psi | 75% | 2359 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 44,817 psi | 72% | 2293 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 37,710 psi | 60% | 2224 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 31,343 psi | 50% | 2159 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 43,482 psi | 70% | 2323 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 80% | 36,956 psi | 59% | 2192 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,498 psi | 73% | 2329 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 45,556 psi | 73% | 2313 fps | 100% |
| Alliant Power Pro 2000-MR | 64 gr | 80% | 39,276 psi | 63% | 2349 fps | 97.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,976 psi | 71% | 2333 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,463 psi | 58% | 2211 fps | 98.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 53,069 psi | 85% | 2369 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,204 psi | 63% | 2267 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 84% | 32,111 psi | 51% | 2172 fps | 95.1% |
| Alliant Reloder-17 | 63 gr | 80% | 31,386 psi | 50% | 2182 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 29,312 psi | 47% | 2136 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,955 psi | 58% | 2346 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,366 psi | 68% | 2326 fps | 98.3% |
| Bofors RP3 | <<locked>> | 80% | 35,955 psi | 58% | 2215 fps | 98.7% |
| Bofors RP7 | <<locked>> | 90% | 44,643 psi | 72% | 2326 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,369 psi | 76% | 2316 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,092 psi | 71% | 2349 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,573 psi | 78% | 2474 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 80% | 51,967 psi | 83% | 2405 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,912 psi | 59% | 2218 fps | 96.3% |
| Hodgdon H414 | <<locked>> | 90% | 41,220 psi | 66% | 2349 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 92% | 48,124 psi | 77% | 2418 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 43,845 psi | 70% | 2333 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 27,688 psi | 44% | 2041 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,566 psi | 63% | 2306 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 92% | 44,048 psi | 71% | 2418 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,310 psi | 42% | 1319 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,076 psi | 67% | 2290 fps | 99.3% |
| IMR 3031 | <<locked>> | 80% | 43,308 psi | 69% | 2323 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,798 psi | 62% | 2221 fps | 98.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,321 psi | 66% | 2241 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 53,287 psi | 85% | 2329 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 44,628 psi | 72% | 2349 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 43,758 psi | 70% | 2310 fps | 95.6% |
| IMR 4831 | <<locked>> | 86% | 32,677 psi | 52% | 2172 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 40,147 psi | 64% | 2293 fps | 98.8% |
| IMR 8208 XBR | <<locked>> | 80% | 45,498 psi | 73% | 2329 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 51,227 psi | 82% | 2402 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,337 psi | 68% | 2303 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,511 psi | 70% | 2264 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 38,624 psi | 62% | 2224 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 38,189 psi | 61% | 2221 fps | 95.7% |
| Lovex S070 | <<locked>> | 90% | 40,770 psi | 65% | 2287 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 42,627 psi | 68% | 2280 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 42,786 psi | 69% | 2287 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,595 psi | 62% | 2257 fps | 98.5% |
| Norma 204 | <<locked>> | 98% | 50,778 psi | 81% | 2480 fps | 95.4% |
| Norma URP | <<locked>> | 84% | 31,966 psi | 51% | 2162 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 37,942 psi | 61% | 2267 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 37,898 psi | 61% | 2293 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 45,295 psi | 73% | 2336 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,730 psi | 72% | 2352 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,921 psi | 78% | 2369 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,643 psi | 43% | 1355 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,821 psi | 81% | 2395 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 39,755 psi | 64% | 2247 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,872 psi | 66% | 2356 fps | 98.5% |
| ReloadSwiss RS 60 | 63 gr | 80% | 33,388 psi | 54% | 2241 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 33,431 psi | 54% | 2224 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 36,027 psi | 58% | 2277 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 46,601 psi | 75% | 2313 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,524 psi | 65% | 2238 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 33,837 psi | 54% | 2165 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 44,643 psi | 72% | 2326 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 38,189 psi | 61% | 2221 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,337 psi | 68% | 2303 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,624 psi | 62% | 2224 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 40,770 psi | 65% | 2287 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,722 psi | 56% | 2208 fps | 97.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,453 psi | 70% | 2310 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,814 psi | 67% | 2297 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,990 psi | 71% | 2238 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,492 psi | 59% | 2123 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 42,569 psi | 68% | 2260 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 48,921 psi | 78% | 2395 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,613 psi | 70% | 2241 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,120 psi | 69% | 2310 fps | 99.1% |
| Somchem S355 | <<locked>> | 80% | 34,867 psi | 56% | 2172 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 25,179 psi | 40% | 2024 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 49,647 psi | 80% | 2287 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,266 psi | 71% | 2231 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,914 psi | 64% | 2221 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,451 psi | 65% | 2231 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,025 psi | 53% | 2116 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 33,446 psi | 54% | 2165 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 45,440 psi | 73% | 2323 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 38,972 psi | 62% | 2224 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 32,721 psi | 52% | 2165 fps | 95% |
| Vihtavuori N555 | <<locked>> | 92% | 31,198 psi | 50% | 2201 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,298 psi | 47% | 2054 fps | 96% |
| Winchester 748 | <<locked>> | 80% | 45,049 psi | 72% | 2365 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 41,408 psi | 66% | 2352 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,269 psi | 47% | 2201 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,191 psi | 66% | 2300 fps | 99.3% |
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 119 powders for .375 H&H Mag. loaded with the .375 | 300gr | Hornady InterLock RN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,612 fps; across all powders the maximum-charge window runs from 1,483 fps to 2,612 fps. Accurate 3100 gives the best case fill at 100 %, and 119 of the 119 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 51–90 %, 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 3100, Accurate 4350, Accurate High Country 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 Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for .375 H&H Mag. with the .375 | 300gr | Hornady InterLock RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate High Country, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.