Load Specifications
Bullet Manufacturer:Frontier 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:1:6.0
Load data in caliber .375 H&H Mag. with .375 | 300gr | Frontier PH PHL 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 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>> | 86% | 53,882 psi | 86% | 2356 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,651 psi | 89% | 2421 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,129 psi | 88% | 2415 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 53,838 psi | 86% | 2434 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,245 psi | 89% | 2418 fps | 96.8% |
| Accurate 4064 | <<locked>> | 94% | 54,897 psi | 88% | 2457 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,372 psi | 81% | 2477 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 90% | 56,173 psi | 90% | 2487 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 53,766 psi | 86% | 2441 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,448 psi | 89% | 2444 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 55,912 psi | 90% | 2421 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 53,650 psi | 86% | 2490 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,608 psi | 89% | 2592 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 53,374 psi | 86% | 2461 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 53,664 psi | 86% | 2356 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 53,925 psi | 86% | 2477 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,429 psi | 79% | 2484 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 98% | 53,548 psi | 86% | 2566 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,041 psi | 56% | 2251 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 38,551 psi | 62% | 2375 fps | 96.2% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,622 psi | 89% | 2346 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,927 psi | 90% | 2503 fps | 99.7% |
| Bofors RP3 | <<locked>> | 94% | 53,635 psi | 86% | 2474 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 54,157 psi | 87% | 2441 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,215 psi | 87% | 2388 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,433 psi | 87% | 2474 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,362 psi | 90% | 2562 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 84% | 56,246 psi | 90% | 2438 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 53,534 psi | 86% | 2418 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,897 psi | 88% | 2484 fps | 99.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,751 psi | 86% | 2526 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 98% | 55,114 psi | 88% | 2493 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 88% | 53,359 psi | 86% | 2451 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,498 psi | 73% | 2379 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,753 psi | 89% | 2526 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 54,824 psi | 88% | 2556 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,070 psi | 56% | 1457 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,607 psi | 88% | 2454 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 52,939 psi | 85% | 2438 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,258 psi | 85% | 2425 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,621 psi | 86% | 2408 fps | 97.4% |
| IMR 4198 | <<locked>> | 82% | 53,998 psi | 87% | 2320 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 50,647 psi | 81% | 2418 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,304 psi | 90% | 2474 fps | 97.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,008 psi | 77% | 2428 fps | 99% |
| IMR 4895 | <<locked>> | 92% | 55,274 psi | 89% | 2503 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 55,448 psi | 89% | 2444 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 55,666 psi | 89% | 2434 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,680 psi | 89% | 2467 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,188 psi | 90% | 2425 fps | 100% |
| Lovex S062 | <<locked>> | 94% | 56,101 psi | 90% | 2464 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,216 psi | 89% | 2467 fps | 98.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,605 psi | 84% | 2451 fps | 97.5% |
| Norma 201 | <<locked>> | 90% | 54,897 psi | 88% | 2438 fps | 100% |
| Norma 202 | <<locked>> | 90% | 55,463 psi | 89% | 2441 fps | 100% |
| Norma 203B | <<locked>> | 92% | 53,084 psi | 85% | 2467 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 50,096 psi | 80% | 2470 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 92% | 53,461 psi | 86% | 2493 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,950 psi | 78% | 2464 fps | 97.6% |
| Ramshot TAC | <<locked>> | 88% | 55,825 psi | 90% | 2464 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,143 psi | 88% | 2480 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 53,098 psi | 85% | 2405 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,563 psi | 57% | 1493 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,984 psi | 88% | 2428 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,303 psi | 89% | 2467 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,085 psi | 87% | 2536 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 53,417 psi | 86% | 2566 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,893 psi | 80% | 2497 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,676 psi | 81% | 2523 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 88% | 56,144 psi | 90% | 2421 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,347 psi | 89% | 2434 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 53,243 psi | 85% | 2461 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 54,157 psi | 87% | 2441 fps | 97% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,216 psi | 89% | 2467 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,680 psi | 89% | 2467 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 56,101 psi | 90% | 2464 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,605 psi | 84% | 2451 fps | 97.5% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,665 psi | 88% | 2402 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,129 psi | 88% | 2520 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,723 psi | 88% | 2375 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,085 psi | 87% | 2444 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,520 psi | 87% | 2464 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 53,606 psi | 86% | 2346 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 53,243 psi | 85% | 2343 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,811 psi | 89% | 2425 fps | 97.7% |
| Somchem S321 | <<locked>> | 84% | 53,098 psi | 85% | 2434 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,941 psi | 90% | 2382 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 53,563 psi | 86% | 2438 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 53,925 psi | 86% | 2464 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,498 psi | 71% | 2425 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 53,476 psi | 86% | 2313 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 53,693 psi | 86% | 2333 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,824 psi | 88% | 2405 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,796 psi | 89% | 2418 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,303 psi | 89% | 2444 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,518 psi | 84% | 2467 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 88% | 56,057 psi | 90% | 2448 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 54,056 psi | 87% | 2425 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,634 psi | 83% | 2474 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,391 psi | 60% | 2316 fps | 97.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,272 psi | 85% | 2454 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 55,419 psi | 89% | 2487 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,983 psi | 87% | 2530 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,140 psi | 50% | 2228 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,259 psi | 87% | 2470 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% | 44,802 psi | 72% | 2238 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,950 psi | 78% | 2336 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,478 psi | 60% | 2175 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,947 psi | 70% | 2300 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 48,486 psi | 78% | 2323 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 35,433 psi | 57% | 2169 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 33,417 psi | 54% | 2192 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 41,191 psi | 66% | 2264 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 35,215 psi | 56% | 2136 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,236 psi | 69% | 2270 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 43,004 psi | 69% | 2264 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,314 psi | 81% | 2444 fps | 99.9% |
| Alliant Power Pro 2000-MR | 60.5 gr | 80% | 37,115 psi | 60% | 2280 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,447 psi | 55% | 2156 fps | 98% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,589 psi | 81% | 2316 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,043 psi | 59% | 2205 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,432 psi | 55% | 2205 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 29,689 psi | 48% | 2119 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,312 psi | 47% | 2113 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 98% | 35,882 psi | 58% | 2316 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,069 psi | 83% | 2303 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,059 psi | 64% | 2264 fps | 97.5% |
| Bofors RP3 | <<locked>> | 80% | 33,750 psi | 54% | 2152 fps | 97.9% |
| Bofors RP7 | <<locked>> | 94% | 47,863 psi | 77% | 2352 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,310 psi | 73% | 2264 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,582 psi | 67% | 2290 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,614 psi | 73% | 2408 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 80% | 49,530 psi | 79% | 2352 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,140 psi | 80% | 2375 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 34,896 psi | 56% | 2156 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 94% | 44,193 psi | 71% | 2379 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 94% | 48,544 psi | 78% | 2398 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 41,510 psi | 67% | 2274 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,544 psi | 47% | 2067 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,463 psi | 60% | 2247 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 96% | 47,703 psi | 76% | 2451 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,078 psi | 42% | 1296 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,900 psi | 64% | 2231 fps | 98.8% |
| IMR 3031 | <<locked>> | 80% | 40,886 psi | 66% | 2270 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,927 psi | 59% | 2165 fps | 97.3% |
| IMR 4166 Enduron | <<locked>> | 84% | 44,541 psi | 71% | 2270 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 51,082 psi | 82% | 2283 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 47,659 psi | 76% | 2372 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 44,266 psi | 71% | 2293 fps | 95.3% |
| IMR 4831 | <<locked>> | 88% | 32,576 psi | 52% | 2152 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 37,869 psi | 61% | 2231 fps | 98.1% |
| IMR 8208 XBR | <<locked>> | 80% | 43,236 psi | 69% | 2270 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 48,733 psi | 78% | 2346 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,813 psi | 64% | 2244 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 41,727 psi | 67% | 2211 fps | 98.7% |
| Lovex S062 | <<locked>> | 80% | 36,695 psi | 59% | 2169 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 38,334 psi | 61% | 2201 fps | 95.3% |
| Lovex S070 | <<locked>> | 94% | 43,555 psi | 70% | 2313 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 40,495 psi | 65% | 2224 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 40,625 psi | 65% | 2234 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,434 psi | 58% | 2195 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 34,127 psi | 55% | 2192 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 35,737 psi | 57% | 2205 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 94% | 40,437 psi | 65% | 2320 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 43,120 psi | 69% | 2274 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,337 psi | 68% | 2293 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,601 psi | 75% | 2313 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,411 psi | 42% | 1329 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,443 psi | 78% | 2343 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 40,321 psi | 65% | 2238 fps | 95% |
| ReloadSwiss RS 52 | 58.7 gr | 80% | 38,493 psi | 62% | 2290 fps | 97.7% |
| ReloadSwiss RS 60 | 59.6 gr | 80% | 31,589 psi | 51% | 2175 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 35,694 psi | 57% | 2254 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 38,783 psi | 62% | 2310 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 44,382 psi | 71% | 2260 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,566 psi | 62% | 2182 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 31,850 psi | 51% | 2106 fps | 97% |
| Rottweil R 907 | <<locked>> | 94% | 47,863 psi | 77% | 2352 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,334 psi | 61% | 2201 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,813 psi | 64% | 2244 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 36,695 psi | 59% | 2169 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 94% | 43,555 psi | 70% | 2313 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,140 psi | 82% | 2356 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,895 psi | 53% | 2149 fps | 96.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,343 psi | 82% | 2336 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,292 psi | 66% | 2251 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,755 psi | 64% | 2238 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,930 psi | 67% | 2185 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,664 psi | 56% | 2073 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 42,902 psi | 69% | 2244 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 46,398 psi | 74% | 2339 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 41,524 psi | 67% | 2188 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,785 psi | 65% | 2247 fps | 98.5% |
| Somchem S355 | <<locked>> | 80% | 32,909 psi | 53% | 2113 fps | 97.1% |
| Somchem S365 | <<locked>> | 84% | 26,876 psi | 43% | 2054 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 47,442 psi | 76% | 2238 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,163 psi | 68% | 2182 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,623 psi | 60% | 2169 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,377 psi | 62% | 2178 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,154 psi | 50% | 2060 fps | 97.9% |
| Vihtavuori N160 | <<locked>> | 86% | 33,591 psi | 54% | 2149 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 43,163 psi | 69% | 2267 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 36,970 psi | 59% | 2172 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 35,070 psi | 56% | 2198 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 31,067 psi | 50% | 2178 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,704 psi | 48% | 2041 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 42,540 psi | 68% | 2306 fps | 99.9% |
| Winchester 760 | <<locked>> | 94% | 44,382 psi | 71% | 2382 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,327 psi | 47% | 2175 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,928 psi | 62% | 2241 fps | 98.7% |
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 | Frontier PH PHL. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,592 fps; across all powders the maximum-charge window runs from 1,457 fps to 2,592 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 50–90 %, 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, ReloadSwiss RS 52 rank at the top here: for .375 H&H Mag. with the .375 | 300gr | Frontier PH PHL 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.