Load Specifications
Bullet:.375 | 300gr | Rhino Solid
Bullet Manufacturer:Rhino Bullets
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:1:16.5
Load data in caliber .375 H&H Mag. with .375 | 300gr | Rhino Solid bullet and 107 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% | 55,347 psi | 89% | 2359 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 53,592 psi | 86% | 2382 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 56,304 psi | 90% | 2415 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 55,332 psi | 89% | 2438 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 53,330 psi | 86% | 2372 fps | 96.1% |
| Accurate 4064 | <<locked>> | 96% | 55,825 psi | 90% | 2451 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 47,877 psi | 77% | 2428 fps | 98.7% |
| Accurate LT-30 | <<locked>> | 82% | 54,737 psi | 88% | 2306 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,158 psi | 88% | 2329 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,317 psi | 87% | 2448 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 54,969 psi | 88% | 2438 fps | 99.7% |
| ADI AR 2219 | <<locked>> | 82% | 55,506 psi | 89% | 2415 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 53,534 psi | 86% | 2405 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 53,447 psi | 86% | 2382 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 55,288 psi | 89% | 2497 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 53,287 psi | 85% | 2543 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 54,447 psi | 87% | 2461 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,172 psi | 88% | 2359 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,274 psi | 89% | 2480 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,427 psi | 76% | 2434 fps | 98.8% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 54,737 psi | 88% | 2562 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,518 psi | 54% | 2201 fps | 96.6% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 53,925 psi | 86% | 2310 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 53,635 psi | 86% | 2457 fps | 99.4% |
| Bofors RP3 | <<locked>> | 96% | 54,868 psi | 88% | 2474 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 55,434 psi | 89% | 2441 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,666 psi | 89% | 2392 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 55,854 psi | 90% | 2477 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 53,882 psi | 86% | 2513 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 84% | 54,215 psi | 87% | 2398 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,172 psi | 88% | 2425 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 56,289 psi | 90% | 2484 fps | 99.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 51,401 psi | 82% | 2474 fps | 96.9% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 56,202 psi | 90% | 2487 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 90% | 54,781 psi | 88% | 2454 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,642 psi | 70% | 2333 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 53,243 psi | 85% | 2480 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 52,547 psi | 84% | 2503 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,925 psi | 56% | 1437 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,028 psi | 90% | 2454 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 54,128 psi | 87% | 2438 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 54,592 psi | 88% | 2425 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,376 psi | 89% | 2411 fps | 97.4% |
| IMR 4198 | <<locked>> | 84% | 55,405 psi | 89% | 2320 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 54,157 psi | 87% | 2425 fps | 97.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,818 psi | 73% | 2382 fps | 98.4% |
| IMR 4895 | <<locked>> | 92% | 53,156 psi | 85% | 2461 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 53,534 psi | 86% | 2405 fps | 100% |
| Lovex D073.4 | <<locked>> | 84% | 56,101 psi | 90% | 2411 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 53,447 psi | 86% | 2392 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 53,229 psi | 85% | 2425 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 54,404 psi | 87% | 2382 fps | 99.9% |
| Lovex S062 | <<locked>> | 94% | 54,230 psi | 87% | 2425 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,997 psi | 85% | 2418 fps | 98.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 50,473 psi | 81% | 2402 fps | 96.8% |
| Norma 201 | <<locked>> | 90% | 52,939 psi | 85% | 2395 fps | 100% |
| Norma 202 | <<locked>> | 90% | 53,447 psi | 86% | 2402 fps | 100% |
| Norma 203B | <<locked>> | 94% | 54,404 psi | 87% | 2467 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 47,863 psi | 77% | 2421 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 94% | 54,752 psi | 88% | 2493 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 46,876 psi | 75% | 2411 fps | 96.8% |
| Ramshot TAC | <<locked>> | 88% | 53,838 psi | 86% | 2418 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 88% | 53,011 psi | 85% | 2434 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 54,694 psi | 88% | 2408 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,404 psi | 57% | 1473 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 53,229 psi | 85% | 2388 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 53,403 psi | 86% | 2425 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 55,405 psi | 89% | 2536 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 54,752 psi | 88% | 2566 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 47,630 psi | 76% | 2448 fps | 98.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,602 psi | 78% | 2467 fps | 98% |
| Rottweil R 901 | <<locked>> | 88% | 54,201 psi | 87% | 2382 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 53,447 psi | 86% | 2395 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 54,447 psi | 87% | 2464 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 55,434 psi | 89% | 2441 fps | 96.9% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,997 psi | 85% | 2418 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 90% | 53,229 psi | 85% | 2425 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 54,230 psi | 87% | 2425 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 50,473 psi | 81% | 2402 fps | 96.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 52,982 psi | 85% | 2365 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 55,738 psi | 89% | 2425 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 56,347 psi | 90% | 2520 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 56,318 psi | 90% | 2379 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 55,419 psi | 89% | 2444 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 56,028 psi | 90% | 2467 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 55,056 psi | 88% | 2346 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 54,665 psi | 88% | 2343 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 53,461 psi | 86% | 2379 fps | 97% |
| Somchem S321 | <<locked>> | 86% | 54,578 psi | 88% | 2434 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 54,070 psi | 87% | 2346 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 54,853 psi | 88% | 2438 fps | 99.8% |
| Somchem S355 | <<locked>> | 98% | 55,114 psi | 88% | 2461 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,496 psi | 68% | 2379 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 86% | 54,897 psi | 88% | 2313 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,042 psi | 88% | 2333 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 55,941 psi | 90% | 2402 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 53,896 psi | 86% | 2382 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 53,156 psi | 85% | 2402 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,314 psi | 81% | 2421 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 88% | 54,114 psi | 87% | 2405 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 55,303 psi | 89% | 2421 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,298 psi | 79% | 2425 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,650 psi | 57% | 2267 fps | 96.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,242 psi | 82% | 2408 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 53,243 psi | 85% | 2444 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 51,634 psi | 83% | 2477 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 92% | 55,811 psi | 89% | 2474 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% | 43,424 psi | 70% | 2205 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,108 psi | 76% | 2297 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,911 psi | 58% | 2139 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,163 psi | 68% | 2260 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 49,806 psi | 80% | 2323 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 33,982 psi | 54% | 2129 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 34,011 psi | 55% | 2192 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 51,576 psi | 83% | 2267 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,982 psi | 83% | 2287 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,653 psi | 64% | 2221 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 33,852 psi | 54% | 2093 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 51,967 psi | 83% | 2372 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,698 psi | 67% | 2231 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 41,234 psi | 66% | 2228 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,414 psi | 78% | 2398 fps | 99.8% |
| Alliant Power Pro 2000-MR | 58.2 gr | 80% | 35,781 psi | 57% | 2231 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,996 psi | 53% | 2110 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,052 psi | 79% | 2283 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,563 psi | 57% | 2162 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 90% | 35,186 psi | 56% | 2201 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 82% | 30,356 psi | 49% | 2119 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,647 psi | 51% | 2156 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,546 psi | 81% | 2270 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,566 psi | 62% | 2221 fps | 96.8% |
| Bofors RP3 | <<locked>> | 80% | 32,300 psi | 52% | 2110 fps | 97.3% |
| Bofors RP7 | <<locked>> | 96% | 49,197 psi | 79% | 2352 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,772 psi | 70% | 2224 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,929 psi | 64% | 2247 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,903 psi | 70% | 2362 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 47,703 psi | 76% | 2316 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,385 psi | 78% | 2336 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 35,665 psi | 57% | 2159 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 96% | 45,194 psi | 72% | 2379 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 98% | 52,953 psi | 85% | 2444 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 39,987 psi | 64% | 2231 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 30,095 psi | 48% | 2067 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,911 psi | 58% | 2205 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 98% | 49,023 psi | 79% | 2451 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,976 psi | 42% | 1283 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,595 psi | 62% | 2192 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 39,218 psi | 63% | 2231 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,491 psi | 57% | 2119 fps | 96.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,905 psi | 74% | 2274 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 49,443 psi | 79% | 2247 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 45,324 psi | 73% | 2293 fps | 95.2% |
| IMR 4831 | <<locked>> | 90% | 33,243 psi | 53% | 2156 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 36,390 psi | 58% | 2188 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 80% | 41,698 psi | 67% | 2231 fps | 99.3% |
| Lovex D073.4 | <<locked>> | 80% | 49,023 psi | 79% | 2323 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 46,760 psi | 75% | 2303 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 38,261 psi | 61% | 2205 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 40,422 psi | 65% | 2172 fps | 98.3% |
| Lovex S062 | <<locked>> | 80% | 35,346 psi | 57% | 2129 fps | 98.3% |
| Lovex S065 | <<locked>> | 90% | 39,189 psi | 63% | 2201 fps | 95.2% |
| Lovex S070 | <<locked>> | 96% | 44,628 psi | 72% | 2313 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 39,117 psi | 63% | 2185 fps | 99% |
| Norma 202 | <<locked>> | 80% | 38,986 psi | 63% | 2192 fps | 100% |
| Norma 203B | <<locked>> | 80% | 34,954 psi | 56% | 2152 fps | 97% |
| Norma URP | <<locked>> | 90% | 34,838 psi | 56% | 2192 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 34,374 psi | 55% | 2162 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 96% | 41,379 psi | 66% | 2320 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 41,553 psi | 67% | 2231 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,785 psi | 65% | 2251 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,049 psi | 72% | 2270 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,324 psi | 42% | 1316 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,789 psi | 75% | 2303 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 41,307 psi | 66% | 2238 fps | 95% |
| ReloadSwiss RS 52 | 56.4 gr | 80% | 36,724 psi | 59% | 2244 fps | 97% |
| ReloadSwiss RS 60 | 57.3 gr | 80% | 30,356 psi | 49% | 2129 fps | 98% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 36,303 psi | 58% | 2251 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 39,769 psi | 64% | 2310 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 42,844 psi | 69% | 2221 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,202 psi | 60% | 2142 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 30,400 psi | 49% | 2064 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 96% | 49,197 psi | 79% | 2352 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 39,189 psi | 63% | 2201 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,261 psi | 61% | 2205 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 35,346 psi | 57% | 2129 fps | 98.3% |
| Shooters World SW4350 | <<locked>> | 96% | 44,628 psi | 72% | 2313 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,443 psi | 79% | 2316 fps | 99.8% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,359 psi | 84% | 2382 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,531 psi | 51% | 2103 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,748 psi | 80% | 2300 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,552 psi | 63% | 2205 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,203 psi | 61% | 2195 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,669 psi | 65% | 2149 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,504 psi | 54% | 2037 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 43,758 psi | 70% | 2241 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 44,773 psi | 72% | 2300 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 40,219 psi | 64% | 2156 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,305 psi | 63% | 2208 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 31,662 psi | 51% | 2073 fps | 96.4% |
| Somchem S365 | <<locked>> | 86% | 27,441 psi | 44% | 2054 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 46,079 psi | 74% | 2205 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,843 psi | 65% | 2149 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,260 psi | 58% | 2136 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,883 psi | 59% | 2139 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,849 psi | 48% | 2021 fps | 97.2% |
| Vihtavuori N160 | <<locked>> | 88% | 34,316 psi | 55% | 2149 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 41,626 psi | 67% | 2224 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 35,462 psi | 57% | 2129 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 35,708 psi | 57% | 2195 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 96% | 31,459 psi | 50% | 2175 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,443 psi | 49% | 2041 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 40,770 psi | 65% | 2264 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 45,194 psi | 72% | 2379 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,376 psi | 60% | 2198 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 107 powders for .375 H&H Mag. loaded with the .375 | 300gr | Rhino Solid. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,566 fps; across all powders the maximum-charge window runs from 1,437 fps to 2,566 fps. Accurate 4350 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.375" calls for a 1:16.5 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 | Rhino Solid 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.