Load Specifications
Bullet Manufacturer:RWS
Bullet Weight:301 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 | 301gr | RWS UNI Classic bullet and 104 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 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% | 55,216 psi | 89% | 2375 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,519 psi | 86% | 2402 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,185 psi | 85% | 2398 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,230 psi | 89% | 2457 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 56,333 psi | 90% | 2441 fps | 97.3% |
| Accurate 4064 | <<locked>> | 94% | 56,391 psi | 90% | 2477 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,909 psi | 83% | 2503 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 88% | 53,969 psi | 87% | 2464 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 54,955 psi | 88% | 2464 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,272 psi | 85% | 2425 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,534 psi | 86% | 2398 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,085 psi | 88% | 2516 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,171 psi | 85% | 2569 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,621 psi | 88% | 2484 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,795 psi | 88% | 2375 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,259 psi | 89% | 2503 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,502 psi | 81% | 2507 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,071 psi | 88% | 2595 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,027 psi | 58% | 2280 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,639 psi | 64% | 2408 fps | 96.9% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,650 psi | 86% | 2480 fps | 99.6% |
| Bofors RP3 | <<locked>> | 94% | 55,013 psi | 88% | 2497 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,535 psi | 89% | 2470 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,085 psi | 88% | 2405 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,709 psi | 89% | 2497 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 53,925 psi | 86% | 2536 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 53,853 psi | 86% | 2415 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,882 psi | 88% | 2441 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,405 psi | 90% | 2513 fps | 99.5% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,143 psi | 88% | 2552 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 96% | 52,968 psi | 85% | 2474 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 88% | 54,462 psi | 87% | 2474 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,818 psi | 75% | 2405 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,461 psi | 86% | 2503 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 56,333 psi | 90% | 2589 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,186 psi | 56% | 1463 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,883 psi | 90% | 2477 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,317 psi | 87% | 2457 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,534 psi | 87% | 2451 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,737 psi | 88% | 2431 fps | 97.8% |
| IMR 4198 | <<locked>> | 82% | 54,955 psi | 88% | 2336 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 51,895 psi | 83% | 2444 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,099 psi | 87% | 2454 fps | 97.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,400 psi | 79% | 2454 fps | 99.3% |
| IMR 4895 | <<locked>> | 90% | 53,316 psi | 85% | 2487 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 53,272 psi | 85% | 2425 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,229 psi | 85% | 2411 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,461 psi | 86% | 2444 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,969 psi | 87% | 2402 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 54,114 psi | 87% | 2444 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 53,040 psi | 85% | 2444 fps | 98.7% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,708 psi | 86% | 2474 fps | 97.9% |
| Norma 201 | <<locked>> | 90% | 56,289 psi | 90% | 2461 fps | 100% |
| Norma 202 | <<locked>> | 88% | 53,330 psi | 86% | 2421 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,404 psi | 87% | 2490 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 51,227 psi | 82% | 2493 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 92% | 54,853 psi | 88% | 2516 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,314 psi | 81% | 2490 fps | 98% |
| Ramshot TAC | <<locked>> | 86% | 53,505 psi | 86% | 2444 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 88% | 56,362 psi | 90% | 2503 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,070 psi | 87% | 2425 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,665 psi | 57% | 1499 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,159 psi | 90% | 2448 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,185 psi | 85% | 2448 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,564 psi | 89% | 2562 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,766 psi | 88% | 2592 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,459 psi | 83% | 2526 fps | 99.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,967 psi | 83% | 2549 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 86% | 54,128 psi | 87% | 2402 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,229 psi | 85% | 2415 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,882 psi | 88% | 2490 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,535 psi | 89% | 2470 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,040 psi | 85% | 2444 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,461 psi | 86% | 2444 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,114 psi | 87% | 2444 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,708 psi | 86% | 2474 fps | 97.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,999 psi | 90% | 2425 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,011 psi | 85% | 2500 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,695 psi | 89% | 2395 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,317 psi | 89% | 2467 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,796 psi | 89% | 2487 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,810 psi | 88% | 2365 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,563 psi | 87% | 2362 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,432 psi | 86% | 2405 fps | 97.5% |
| Somchem S321 | <<locked>> | 84% | 54,360 psi | 87% | 2454 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,751 psi | 86% | 2362 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,781 psi | 88% | 2461 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 55,230 psi | 89% | 2487 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,803 psi | 73% | 2451 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,505 psi | 87% | 2329 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,911 psi | 88% | 2352 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,101 psi | 90% | 2421 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,780 psi | 86% | 2402 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,345 psi | 86% | 2428 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,954 psi | 87% | 2493 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 86% | 53,766 psi | 86% | 2425 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,245 psi | 89% | 2441 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,924 psi | 85% | 2500 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,580 psi | 62% | 2343 fps | 98% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,737 psi | 88% | 2480 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 53,214 psi | 85% | 2464 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,376 psi | 89% | 2556 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,024 psi | 51% | 2264 fps | 97.4% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,506 psi | 89% | 2493 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% | 45,905 psi | 74% | 2257 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,908 psi | 80% | 2356 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,551 psi | 62% | 2195 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,121 psi | 72% | 2323 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 46,499 psi | 75% | 2300 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 36,448 psi | 58% | 2192 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 32,213 psi | 52% | 2169 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 42,090 psi | 67% | 2283 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 35,853 psi | 57% | 2156 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,135 psi | 71% | 2290 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 43,990 psi | 71% | 2280 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,459 psi | 83% | 2467 fps | 100% |
| Alliant Power Pro 2000-MR | 61.8 gr | 80% | 38,029 psi | 61% | 2306 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,331 psi | 57% | 2178 fps | 98.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,517 psi | 83% | 2336 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,913 psi | 61% | 2228 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,185 psi | 53% | 2182 fps | 95.4% |
| Alliant Reloder-17 | 60.9 gr | 80% | 30,429 psi | 49% | 2146 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,037 psi | 48% | 2139 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,956 psi | 59% | 2352 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,031 psi | 66% | 2287 fps | 97.9% |
| Bofors RP3 | <<locked>> | 80% | 34,809 psi | 56% | 2178 fps | 98.4% |
| Bofors RP7 | <<locked>> | 92% | 46,151 psi | 74% | 2333 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,021 psi | 74% | 2280 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,598 psi | 68% | 2313 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,963 psi | 75% | 2434 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 80% | 50,589 psi | 81% | 2375 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,256 psi | 82% | 2398 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 35,694 psi | 57% | 2178 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 92% | 42,569 psi | 68% | 2359 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 94% | 49,690 psi | 80% | 2425 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 42,482 psi | 68% | 2293 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,384 psi | 46% | 2047 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,276 psi | 61% | 2270 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 94% | 45,629 psi | 73% | 2428 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,339 psi | 42% | 1309 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,770 psi | 65% | 2251 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 42,018 psi | 67% | 2290 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,637 psi | 60% | 2185 fps | 97.7% |
| IMR 4166 Enduron | <<locked>> | 82% | 42,844 psi | 69% | 2251 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 51,851 psi | 83% | 2297 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 46,064 psi | 74% | 2356 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 42,569 psi | 68% | 2274 fps | 95.1% |
| IMR 4831 | <<locked>> | 88% | 33,475 psi | 54% | 2178 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 38,827 psi | 62% | 2254 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 44,135 psi | 71% | 2290 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 49,879 psi | 80% | 2365 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,930 psi | 66% | 2267 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,569 psi | 68% | 2231 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 37,594 psi | 60% | 2192 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 36,970 psi | 59% | 2182 fps | 95.1% |
| Lovex S070 | <<locked>> | 92% | 42,047 psi | 67% | 2293 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 41,408 psi | 66% | 2247 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 41,539 psi | 67% | 2254 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,304 psi | 60% | 2218 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 32,895 psi | 53% | 2172 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 36,666 psi | 59% | 2231 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 38,972 psi | 62% | 2300 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 44,048 psi | 71% | 2300 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,323 psi | 69% | 2316 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,601 psi | 76% | 2336 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,498 psi | 42% | 1339 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,588 psi | 80% | 2362 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,234 psi | 66% | 2260 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,436 psi | 63% | 2316 fps | 98.1% |
| ReloadSwiss RS 60 | 60.9 gr | 80% | 32,401 psi | 52% | 2205 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,345 psi | 55% | 2231 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,144 psi | 60% | 2287 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 45,237 psi | 73% | 2280 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,320 psi | 63% | 2201 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 32,721 psi | 52% | 2133 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 46,151 psi | 74% | 2333 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 36,970 psi | 59% | 2182 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,930 psi | 66% | 2267 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,594 psi | 60% | 2192 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 92% | 42,047 psi | 67% | 2293 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,243 psi | 84% | 2379 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,620 psi | 54% | 2172 fps | 96.9% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,504 psi | 84% | 2356 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,279 psi | 68% | 2277 fps | 97.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,596 psi | 65% | 2260 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,873 psi | 69% | 2205 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,534 psi | 57% | 2093 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,048 psi | 71% | 2270 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 47,456 psi | 76% | 2362 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,438 psi | 68% | 2208 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,771 psi | 67% | 2270 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 33,750 psi | 54% | 2139 fps | 97.6% |
| Somchem S365 | <<locked>> | 82% | 25,991 psi | 42% | 2034 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 48,486 psi | 78% | 2257 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,163 psi | 69% | 2201 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,696 psi | 62% | 2192 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,291 psi | 63% | 2198 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,952 psi | 51% | 2083 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 86% | 34,447 psi | 55% | 2175 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 44,280 psi | 71% | 2290 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 37,811 psi | 61% | 2192 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 33,663 psi | 54% | 2175 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 94% | 31,879 psi | 51% | 2205 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,427 psi | 46% | 2014 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 43,439 psi | 70% | 2326 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 42,569 psi | 68% | 2359 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,110 psi | 48% | 2211 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,958 psi | 64% | 2264 fps | 99% |
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 104 powders for .375 H&H Mag. loaded with the .375 | 301gr | RWS UNI Classic. Alliant Reloder-17 delivers the highest muzzle velocity at 2,595 fps; across all powders the maximum-charge window runs from 1,463 fps to 2,595 fps. Accurate 4350 gives the best case fill at 100 %, and 104 of the 104 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 301.0 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .375 H&H Mag. with the .375 | 301gr | RWS UNI Classic 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.