Load Specifications
Bullet Manufacturer:Hornady
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 | Hornady InterBond RN bullet and 105 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 Alliant Reloder-17.
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% | 54,679 psi | 88% | 2369 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 56,347 psi | 90% | 2434 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,854 psi | 90% | 2428 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,491 psi | 87% | 2448 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,709 psi | 89% | 2431 fps | 97% |
| Accurate 4064 | <<locked>> | 94% | 55,593 psi | 89% | 2467 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,213 psi | 82% | 2493 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 88% | 53,505 psi | 86% | 2457 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 54,317 psi | 87% | 2454 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 56,101 psi | 90% | 2457 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 52,895 psi | 85% | 2392 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,491 psi | 87% | 2507 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 56,362 psi | 90% | 2608 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 53,954 psi | 87% | 2474 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,244 psi | 87% | 2369 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,752 psi | 88% | 2493 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,908 psi | 80% | 2497 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,215 psi | 87% | 2582 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,578 psi | 57% | 2270 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,044 psi | 63% | 2392 fps | 96.5% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 56,188 psi | 90% | 2356 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 52,982 psi | 85% | 2470 fps | 99.5% |
| Bofors RP3 | <<locked>> | 94% | 54,259 psi | 87% | 2487 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 54,897 psi | 88% | 2457 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,636 psi | 88% | 2402 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,984 psi | 88% | 2487 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 53,359 psi | 86% | 2526 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 53,316 psi | 85% | 2408 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,172 psi | 87% | 2431 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,709 psi | 89% | 2500 fps | 99.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 54,534 psi | 87% | 2539 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 98% | 55,854 psi | 90% | 2510 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 88% | 54,012 psi | 87% | 2467 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,209 psi | 74% | 2392 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,362 psi | 90% | 2539 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 55,608 psi | 89% | 2575 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,128 psi | 56% | 1460 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,201 psi | 89% | 2467 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 53,766 psi | 86% | 2451 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,867 psi | 86% | 2438 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,360 psi | 87% | 2425 fps | 97.6% |
| IMR 4198 | <<locked>> | 82% | 54,592 psi | 88% | 2329 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 51,314 psi | 82% | 2434 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 96% | 53,490 psi | 86% | 2441 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,762 psi | 78% | 2444 fps | 99.1% |
| IMR 4895 | <<locked>> | 92% | 56,115 psi | 90% | 2523 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 56,101 psi | 90% | 2457 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 56,304 psi | 90% | 2448 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 56,376 psi | 90% | 2480 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,519 psi | 86% | 2395 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 53,650 psi | 86% | 2438 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,898 psi | 90% | 2480 fps | 98.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,098 psi | 85% | 2464 fps | 97.7% |
| Norma 201 | <<locked>> | 90% | 55,564 psi | 89% | 2451 fps | 100% |
| Norma 202 | <<locked>> | 90% | 56,130 psi | 90% | 2454 fps | 100% |
| Norma 203B | <<locked>> | 92% | 53,896 psi | 86% | 2484 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 50,575 psi | 81% | 2484 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 92% | 54,186 psi | 87% | 2507 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,763 psi | 80% | 2480 fps | 97.8% |
| Ramshot TAC | <<locked>> | 88% | 56,318 psi | 90% | 2477 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,738 psi | 89% | 2493 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 53,664 psi | 86% | 2418 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,621 psi | 57% | 1496 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,695 psi | 89% | 2441 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 56,057 psi | 90% | 2484 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,810 psi | 88% | 2552 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,143 psi | 87% | 2582 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,865 psi | 82% | 2516 fps | 99.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,256 psi | 82% | 2536 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 86% | 53,606 psi | 86% | 2395 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,999 psi | 90% | 2448 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,128 psi | 87% | 2480 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 54,897 psi | 88% | 2457 fps | 97.2% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,898 psi | 90% | 2480 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 56,376 psi | 90% | 2480 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 53,650 psi | 86% | 2438 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,098 psi | 85% | 2464 fps | 97.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,288 psi | 89% | 2415 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,927 psi | 90% | 2536 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,317 psi | 89% | 2388 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,636 psi | 88% | 2457 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,100 psi | 88% | 2477 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,317 psi | 87% | 2359 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 53,867 psi | 86% | 2356 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 52,837 psi | 85% | 2395 fps | 97.3% |
| Somchem S321 | <<locked>> | 84% | 53,693 psi | 86% | 2444 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,316 psi | 85% | 2356 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,099 psi | 87% | 2451 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 54,505 psi | 87% | 2477 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,208 psi | 72% | 2441 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 53,969 psi | 87% | 2323 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,418 psi | 87% | 2346 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,521 psi | 89% | 2415 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 56,405 psi | 90% | 2431 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 56,057 psi | 90% | 2457 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,272 psi | 85% | 2480 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 86% | 53,055 psi | 85% | 2415 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 54,592 psi | 88% | 2434 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,301 psi | 84% | 2490 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,014 psi | 61% | 2333 fps | 97.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,041 psi | 87% | 2470 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 56,318 psi | 90% | 2503 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 54,766 psi | 88% | 2543 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,662 psi | 51% | 2251 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,810 psi | 88% | 2484 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% | 45,368 psi | 73% | 2251 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,429 psi | 79% | 2349 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,985 psi | 61% | 2185 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,643 psi | 72% | 2316 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 48,965 psi | 79% | 2336 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 35,926 psi | 58% | 2182 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 33,968 psi | 54% | 2205 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 41,626 psi | 67% | 2274 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 35,447 psi | 57% | 2146 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,685 psi | 70% | 2283 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 43,598 psi | 70% | 2274 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,923 psi | 82% | 2457 fps | 100% |
| Alliant Power Pro 2000-MR | 61.3 gr | 80% | 37,652 psi | 60% | 2297 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,882 psi | 56% | 2165 fps | 98.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,198 psi | 82% | 2329 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,463 psi | 60% | 2218 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 32,692 psi | 52% | 2169 fps | 95% |
| Alliant Reloder-17 | 60.4 gr | 80% | 30,110 psi | 48% | 2133 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,646 psi | 48% | 2126 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,506 psi | 59% | 2339 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,634 psi | 84% | 2316 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,640 psi | 65% | 2277 fps | 97.7% |
| Bofors RP3 | <<locked>> | 80% | 34,360 psi | 55% | 2169 fps | 98.2% |
| Bofors RP7 | <<locked>> | 92% | 45,556 psi | 73% | 2323 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,745 psi | 73% | 2277 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,163 psi | 68% | 2303 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,282 psi | 74% | 2425 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 50,038 psi | 80% | 2365 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,792 psi | 81% | 2388 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 35,273 psi | 57% | 2169 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 92% | 42,047 psi | 67% | 2346 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 94% | 49,066 psi | 79% | 2411 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 42,003 psi | 67% | 2287 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,834 psi | 48% | 2080 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,855 psi | 61% | 2260 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 94% | 45,150 psi | 72% | 2415 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,223 psi | 42% | 1306 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,509 psi | 65% | 2247 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 41,452 psi | 66% | 2283 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,202 psi | 60% | 2175 fps | 97.5% |
| IMR 4166 Enduron | <<locked>> | 82% | 42,453 psi | 68% | 2241 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 51,474 psi | 83% | 2293 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 45,498 psi | 73% | 2346 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 44,773 psi | 72% | 2310 fps | 95.5% |
| IMR 4831 | <<locked>> | 88% | 33,098 psi | 53% | 2169 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 38,348 psi | 61% | 2244 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 43,685 psi | 70% | 2283 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 49,153 psi | 79% | 2356 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,451 psi | 65% | 2260 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,163 psi | 68% | 2224 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 37,144 psi | 60% | 2182 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 38,827 psi | 62% | 2215 fps | 95.6% |
| Lovex S070 | <<locked>> | 92% | 41,481 psi | 67% | 2283 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 40,944 psi | 66% | 2238 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 41,104 psi | 66% | 2244 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,854 psi | 59% | 2208 fps | 97.9% |
| Norma URP | <<locked>> | 88% | 34,592 psi | 55% | 2208 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 36,260 psi | 58% | 2221 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 94% | 41,002 psi | 66% | 2336 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 43,482 psi | 70% | 2287 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,917 psi | 69% | 2306 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,137 psi | 76% | 2326 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,571 psi | 43% | 1339 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,095 psi | 79% | 2356 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 40,654 psi | 65% | 2247 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,943 psi | 62% | 2306 fps | 97.9% |
| ReloadSwiss RS 60 | 60.4 gr | 80% | 32,068 psi | 51% | 2192 fps | 98.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 33,852 psi | 54% | 2218 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 36,854 psi | 59% | 2277 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 44,918 psi | 72% | 2274 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,044 psi | 63% | 2195 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 32,271 psi | 52% | 2119 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 92% | 45,556 psi | 73% | 2323 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,827 psi | 62% | 2215 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,451 psi | 65% | 2260 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,144 psi | 60% | 2182 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 41,481 psi | 67% | 2283 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,793 psi | 83% | 2372 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,243 psi | 53% | 2162 fps | 96.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,938 psi | 83% | 2349 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,626 psi | 67% | 2264 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,176 psi | 64% | 2251 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,409 psi | 68% | 2195 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,114 psi | 56% | 2083 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 43,468 psi | 70% | 2257 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 46,978 psi | 75% | 2352 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 41,959 psi | 67% | 2201 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,379 psi | 66% | 2264 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 33,330 psi | 53% | 2126 fps | 97.3% |
| Somchem S365 | <<locked>> | 82% | 25,672 psi | 41% | 2024 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 47,993 psi | 77% | 2251 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,641 psi | 68% | 2192 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,174 psi | 61% | 2182 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,827 psi | 62% | 2188 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,589 psi | 51% | 2073 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 34,098 psi | 55% | 2165 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 43,801 psi | 70% | 2280 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 37,391 psi | 60% | 2182 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 35,592 psi | 57% | 2211 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 94% | 31,517 psi | 51% | 2195 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,137 psi | 45% | 2005 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 42,975 psi | 69% | 2320 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 42,177 psi | 68% | 2349 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,718 psi | 48% | 2192 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,523 psi | 63% | 2254 fps | 98.9% |
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 105 powders for .375 H&H Mag. loaded with the .375 | 300gr | Hornady InterBond RN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,608 fps; across all powders the maximum-charge window runs from 1,460 fps to 2,608 fps. Accurate 4350 gives the best case fill at 100 %, and 105 of the 105 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 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, Alliant Reloder-17 rank at the top here: for .375 H&H Mag. with the .375 | 300gr | Hornady InterBond 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.