Load Specifications
Bullet Manufacturer:Reichenberg
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 | Reichenberg Super Penetra 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% | 2375 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 53,534 psi | 86% | 2398 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 55,912 psi | 90% | 2428 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 55,288 psi | 89% | 2454 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 53,432 psi | 86% | 2392 fps | 96.4% |
| Accurate 4064 | <<locked>> | 96% | 55,724 psi | 89% | 2470 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 48,109 psi | 77% | 2448 fps | 98.9% |
| Accurate LT-30 | <<locked>> | 82% | 54,897 psi | 88% | 2323 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,347 psi | 89% | 2346 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,404 psi | 87% | 2464 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 55,332 psi | 89% | 2461 fps | 99.8% |
| ADI AR 2219 | <<locked>> | 82% | 55,709 psi | 89% | 2431 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 53,737 psi | 86% | 2425 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 53,592 psi | 86% | 2398 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 55,434 psi | 89% | 2516 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 53,824 psi | 86% | 2569 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 54,723 psi | 88% | 2480 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,100 psi | 88% | 2375 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,579 psi | 89% | 2500 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,514 psi | 76% | 2454 fps | 99% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 55,245 psi | 89% | 2589 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,301 psi | 53% | 2215 fps | 96.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 53,940 psi | 86% | 2326 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 54,157 psi | 87% | 2480 fps | 99.5% |
| Bofors RP3 | <<locked>> | 96% | 54,969 psi | 88% | 2493 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 55,753 psi | 89% | 2464 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,724 psi | 89% | 2408 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 56,086 psi | 90% | 2497 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 54,375 psi | 87% | 2536 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 54,433 psi | 87% | 2418 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,448 psi | 89% | 2444 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 56,405 psi | 90% | 2503 fps | 99.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 51,692 psi | 83% | 2497 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 98% | 53,171 psi | 85% | 2464 fps | 96% |
| Hodgdon H4895 | <<locked>> | 90% | 54,955 psi | 88% | 2474 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,671 psi | 70% | 2349 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 53,592 psi | 86% | 2500 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 52,968 psi | 85% | 2530 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,809 psi | 56% | 1450 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,217 psi | 90% | 2474 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 54,259 psi | 87% | 2454 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 54,766 psi | 88% | 2444 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,419 psi | 89% | 2431 fps | 97.6% |
| IMR 4198 | <<locked>> | 84% | 55,796 psi | 89% | 2339 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 48,994 psi | 79% | 2392 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 98% | 54,389 psi | 87% | 2448 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,861 psi | 74% | 2398 fps | 98.6% |
| IMR 4895 | <<locked>> | 92% | 53,490 psi | 86% | 2484 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 53,737 psi | 86% | 2425 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 53,359 psi | 86% | 2408 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 53,417 psi | 86% | 2441 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 54,404 psi | 87% | 2398 fps | 99.9% |
| Lovex S062 | <<locked>> | 94% | 54,230 psi | 87% | 2441 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,997 psi | 85% | 2438 fps | 98.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 50,430 psi | 81% | 2421 fps | 97.1% |
| Norma 201 | <<locked>> | 92% | 56,391 psi | 90% | 2457 fps | 100% |
| Norma 202 | <<locked>> | 90% | 53,388 psi | 86% | 2418 fps | 100% |
| Norma 203B | <<locked>> | 94% | 54,650 psi | 88% | 2487 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 47,921 psi | 77% | 2441 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 94% | 55,230 psi | 89% | 2513 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 47,021 psi | 75% | 2434 fps | 97.1% |
| Ramshot TAC | <<locked>> | 88% | 54,041 psi | 87% | 2441 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 88% | 53,301 psi | 85% | 2457 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 86% | 54,766 psi | 88% | 2428 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,215 psi | 56% | 1486 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 53,287 psi | 85% | 2408 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 53,519 psi | 86% | 2444 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 55,854 psi | 90% | 2559 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 55,071 psi | 88% | 2589 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 47,718 psi | 77% | 2467 fps | 98.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,617 psi | 78% | 2487 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 88% | 53,925 psi | 86% | 2398 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 53,171 psi | 85% | 2408 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 54,563 psi | 87% | 2480 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 55,753 psi | 89% | 2464 fps | 97.1% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,997 psi | 85% | 2438 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 90% | 53,417 psi | 86% | 2441 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 54,230 psi | 87% | 2441 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 50,430 psi | 81% | 2421 fps | 97.1% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 52,982 psi | 85% | 2382 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 56,057 psi | 90% | 2444 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 53,258 psi | 85% | 2497 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 52,924 psi | 85% | 2356 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 55,521 psi | 89% | 2464 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 56,289 psi | 90% | 2487 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 55,085 psi | 88% | 2362 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 54,853 psi | 88% | 2362 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 53,722 psi | 86% | 2398 fps | 97.3% |
| Somchem S321 | <<locked>> | 86% | 54,592 psi | 88% | 2454 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 54,143 psi | 87% | 2362 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 55,332 psi | 89% | 2461 fps | 99.9% |
| Somchem S355 | <<locked>> | 98% | 55,303 psi | 89% | 2480 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,641 psi | 68% | 2398 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 86% | 55,071 psi | 88% | 2333 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,172 psi | 88% | 2349 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 56,144 psi | 90% | 2421 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 54,085 psi | 87% | 2402 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 53,345 psi | 86% | 2421 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,633 psi | 81% | 2441 fps | 99% |
| Vihtavuori N530 | <<locked>> | 88% | 54,070 psi | 87% | 2421 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 55,463 psi | 89% | 2441 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,501 psi | 79% | 2448 fps | 98.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,404 psi | 57% | 2280 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,488 psi | 83% | 2431 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 53,403 psi | 86% | 2464 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 51,924 psi | 83% | 2500 fps | 97.3% |
| Winchester StaBALL Match | <<locked>> | 92% | 56,057 psi | 90% | 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% | 43,033 psi | 69% | 2218 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,862 psi | 75% | 2313 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,041 psi | 56% | 2142 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,959 psi | 67% | 2274 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 49,922 psi | 80% | 2343 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 33,199 psi | 53% | 2133 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 33,779 psi | 54% | 2201 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 51,764 psi | 83% | 2287 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,170 psi | 84% | 2306 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,653 psi | 64% | 2238 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 80% | 33,678 psi | 54% | 2106 fps | 95.9% |
| ADI AR 2219 | <<locked>> | 80% | 52,185 psi | 84% | 2392 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,771 psi | 67% | 2247 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 41,046 psi | 66% | 2238 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,617 psi | 78% | 2421 fps | 99.8% |
| Alliant Power Pro 2000-MR | 59.7 gr | 80% | 35,636 psi | 57% | 2251 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,735 psi | 52% | 2123 fps | 97.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,834 psi | 78% | 2297 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,476 psi | 57% | 2178 fps | 96.8% |
| Alliant Reloder-16 | <<locked>> | 90% | 34,998 psi | 56% | 2218 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 82% | 30,226 psi | 48% | 2136 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 29,544 psi | 47% | 2123 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,633 psi | 81% | 2287 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,464 psi | 62% | 2238 fps | 97% |
| Bofors RP3 | <<locked>> | 80% | 32,024 psi | 51% | 2123 fps | 97.4% |
| Bofors RP7 | <<locked>> | 94% | 46,064 psi | 74% | 2323 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,714 psi | 70% | 2241 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,784 psi | 64% | 2260 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,874 psi | 70% | 2382 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 80% | 47,732 psi | 77% | 2333 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,399 psi | 78% | 2356 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 35,433 psi | 57% | 2172 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 94% | 42,438 psi | 68% | 2349 fps | 95% |
| Hodgdon H4350 | <<locked>> | 96% | 49,879 psi | 80% | 2418 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 39,943 psi | 64% | 2247 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 29,805 psi | 48% | 2080 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,679 psi | 57% | 2215 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 96% | 45,905 psi | 74% | 2421 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,846 psi | 41% | 1293 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,493 psi | 62% | 2208 fps | 98.5% |
| IMR 3031 | <<locked>> | 80% | 39,160 psi | 63% | 2247 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,317 psi | 57% | 2136 fps | 96.8% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,818 psi | 73% | 2290 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 49,617 psi | 80% | 2267 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 46,021 psi | 74% | 2346 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 45,368 psi | 73% | 2313 fps | 95.5% |
| IMR 4831 | <<locked>> | 90% | 32,866 psi | 53% | 2165 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 36,289 psi | 58% | 2205 fps | 97.7% |
| IMR 8208 XBR | <<locked>> | 80% | 41,771 psi | 67% | 2247 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 46,499 psi | 75% | 2316 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 38,029 psi | 61% | 2218 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 40,161 psi | 64% | 2185 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 34,911 psi | 56% | 2139 fps | 98.4% |
| Lovex S065 | <<locked>> | 90% | 39,030 psi | 63% | 2218 fps | 95.5% |
| Lovex S070 | <<locked>> | 96% | 44,382 psi | 71% | 2329 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 38,595 psi | 62% | 2195 fps | 99.1% |
| Norma 202 | <<locked>> | 80% | 38,798 psi | 62% | 2205 fps | 100% |
| Norma 203B | <<locked>> | 80% | 34,853 psi | 56% | 2169 fps | 97.2% |
| Norma URP | <<locked>> | 90% | 34,708 psi | 56% | 2208 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 34,200 psi | 55% | 2175 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 96% | 41,495 psi | 67% | 2339 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 41,408 psi | 66% | 2247 fps | 96.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,698 psi | 65% | 2267 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,991 psi | 72% | 2287 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,121 psi | 42% | 1325 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,717 psi | 75% | 2320 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 41,249 psi | 66% | 2257 fps | 95.2% |
| ReloadSwiss RS 52 | 57.9 gr | 80% | 36,666 psi | 59% | 2260 fps | 97.2% |
| ReloadSwiss RS 60 | 58.8 gr | 80% | 30,139 psi | 48% | 2142 fps | 98.2% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 33,924 psi | 54% | 2221 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 37,217 psi | 60% | 2280 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 42,250 psi | 68% | 2231 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,666 psi | 59% | 2152 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 29,994 psi | 48% | 2070 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 94% | 46,064 psi | 74% | 2323 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 39,030 psi | 63% | 2218 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,029 psi | 61% | 2218 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 34,911 psi | 56% | 2139 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 96% | 44,382 psi | 71% | 2329 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,487 psi | 79% | 2336 fps | 99.9% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,417 psi | 84% | 2402 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,386 psi | 50% | 2119 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,734 psi | 80% | 2316 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,320 psi | 63% | 2218 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,159 psi | 61% | 2211 fps | 98% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,422 psi | 65% | 2162 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,243 psi | 53% | 2051 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 43,874 psi | 70% | 2260 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 44,628 psi | 72% | 2316 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 39,784 psi | 64% | 2165 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,189 psi | 63% | 2221 fps | 98.1% |
| Somchem S355 | <<locked>> | 80% | 31,125 psi | 50% | 2080 fps | 96.4% |
| Somchem S365 | <<locked>> | 86% | 27,064 psi | 43% | 2064 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 45,890 psi | 74% | 2218 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,669 psi | 65% | 2162 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,911 psi | 58% | 2146 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,695 psi | 59% | 2152 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 29,515 psi | 47% | 2031 fps | 97.3% |
| Vihtavuori N160 | <<locked>> | 88% | 34,214 psi | 55% | 2165 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 41,655 psi | 67% | 2244 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 80% | 35,302 psi | 57% | 2142 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 35,520 psi | 57% | 2211 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 96% | 31,053 psi | 50% | 2182 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,168 psi | 48% | 2054 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 40,770 psi | 65% | 2280 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 42,438 psi | 68% | 2349 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,275 psi | 60% | 2211 fps | 98.3% |
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 107 powders for .375 H&H Mag. loaded with the .375 | 300gr | Reichenberg Super Penetra. Alliant Reloder-17 delivers the highest muzzle velocity at 2,589 fps; across all powders the maximum-charge window runs from 1,450 fps to 2,589 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 53–90 %, 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 | Reichenberg Super Penetra 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.