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:1:15.5
Load data in caliber .375 H&H Mag. with .375 | 300gr | Frontier PH HPFB bullet and 105 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 52 and ReloadSwiss RS 60.
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% | 54,027 psi | 87% | 2333 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 55,898 psi | 90% | 2398 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 54,679 psi | 88% | 2388 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 53,650 psi | 86% | 2408 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 55,492 psi | 89% | 2385 fps | 96.3% |
| Accurate 4064 | <<locked>> | 96% | 54,302 psi | 87% | 2428 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,412 psi | 74% | 2395 fps | 98.3% |
| Accurate LT-30 | <<locked>> | 82% | 53,882 psi | 86% | 2283 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,288 psi | 87% | 2306 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 56,202 psi | 90% | 2457 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 53,693 psi | 86% | 2411 fps | 99.5% |
| ADI AR 2219 | <<locked>> | 82% | 54,404 psi | 87% | 2392 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 55,622 psi | 89% | 2418 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 55,419 psi | 89% | 2395 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 53,780 psi | 86% | 2464 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 55,506 psi | 89% | 2559 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 52,910 psi | 85% | 2428 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 53,896 psi | 86% | 2336 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 54,012 psi | 87% | 2451 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,209 psi | 74% | 2398 fps | 98.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 53,229 psi | 85% | 2530 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 32,619 psi | 52% | 2169 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 56,217 psi | 90% | 2326 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 55,956 psi | 90% | 2474 fps | 99.5% |
| Bofors RP3 | <<locked>> | 96% | 53,272 psi | 85% | 2444 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 54,114 psi | 87% | 2408 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 88% | 54,549 psi | 87% | 2365 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 54,273 psi | 87% | 2448 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 56,072 psi | 90% | 2530 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 52,852 psi | 85% | 2372 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 53,795 psi | 86% | 2398 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 54,839 psi | 88% | 2454 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 49,908 psi | 80% | 2438 fps | 96.4% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 54,882 psi | 88% | 2454 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 90% | 53,388 psi | 86% | 2425 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,380 psi | 68% | 2300 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 55,245 psi | 89% | 2493 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,766 psi | 56% | 1424 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 54,708 psi | 88% | 2425 fps | 99.9% |
| IMR 3031 | <<locked>> | 92% | 56,188 psi | 90% | 2451 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 53,258 psi | 85% | 2395 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 92% | 53,998 psi | 87% | 2379 fps | 96.9% |
| IMR 4198 | <<locked>> | 84% | 54,346 psi | 87% | 2297 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 56,391 psi | 90% | 2441 fps | 97.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,266 psi | 71% | 2346 fps | 98% |
| IMR 4895 | <<locked>> | 94% | 55,317 psi | 89% | 2477 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 90% | 55,622 psi | 89% | 2418 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 55,811 psi | 89% | 2408 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 55,419 psi | 89% | 2438 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 53,287 psi | 85% | 2356 fps | 99.7% |
| Lovex S062 | <<locked>> | 96% | 56,173 psi | 90% | 2438 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,663 psi | 83% | 2388 fps | 97.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 48,907 psi | 78% | 2369 fps | 96.3% |
| Norma 201 | <<locked>> | 92% | 54,998 psi | 88% | 2411 fps | 100% |
| Norma 202 | <<locked>> | 92% | 55,288 psi | 89% | 2415 fps | 100% |
| Norma 203B | <<locked>> | 96% | 56,405 psi | 90% | 2480 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 46,253 psi | 74% | 2388 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 94% | 53,069 psi | 85% | 2461 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 45,600 psi | 73% | 2379 fps | 96.2% |
| Ramshot TAC | <<locked>> | 90% | 56,130 psi | 90% | 2438 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,201 psi | 89% | 2451 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 53,432 psi | 86% | 2379 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,259 psi | 57% | 1463 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 55,506 psi | 89% | 2405 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 55,564 psi | 89% | 2438 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 53,650 psi | 86% | 2503 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 53,214 psi | 85% | 2533 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,919 psi | 74% | 2411 fps | 98% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,239 psi | 76% | 2431 fps | 97.5% |
| Rottweil R 901 | <<locked>> | 90% | 56,159 psi | 90% | 2395 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 55,274 psi | 89% | 2408 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 56,391 psi | 90% | 2474 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 54,114 psi | 87% | 2408 fps | 96.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,663 psi | 83% | 2388 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 92% | 55,419 psi | 89% | 2438 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 56,173 psi | 90% | 2438 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 48,907 psi | 78% | 2369 fps | 96.3% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,158 psi | 88% | 2379 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 54,549 psi | 87% | 2402 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 54,636 psi | 88% | 2487 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 55,027 psi | 88% | 2356 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,201 psi | 87% | 2415 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 54,505 psi | 87% | 2434 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 53,809 psi | 86% | 2320 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 53,301 psi | 85% | 2320 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 52,069 psi | 83% | 2346 fps | 96.5% |
| Somchem S321 | <<locked>> | 86% | 53,301 psi | 85% | 2408 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 56,130 psi | 90% | 2359 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 53,650 psi | 86% | 2411 fps | 99.7% |
| Somchem S355 | <<locked>> | 98% | 53,635 psi | 86% | 2431 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,278 psi | 66% | 2346 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 86% | 53,809 psi | 86% | 2293 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 53,766 psi | 86% | 2306 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 54,592 psi | 88% | 2379 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 55,912 psi | 90% | 2395 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,071 psi | 88% | 2415 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,950 psi | 78% | 2388 fps | 98.5% |
| Vihtavuori N530 | <<locked>> | 90% | 56,101 psi | 90% | 2418 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 53,824 psi | 86% | 2395 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,790 psi | 77% | 2395 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 34,476 psi | 55% | 2231 fps | 96% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,835 psi | 80% | 2379 fps | 99.8% |
| Winchester 748 | <<locked>> | 90% | 55,390 psi | 89% | 2461 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 50,183 psi | 80% | 2444 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 92% | 54,317 psi | 87% | 2444 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% | 42,250 psi | 68% | 2178 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 45,876 psi | 74% | 2270 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,809 psi | 56% | 2113 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,988 psi | 66% | 2231 fps | 99.9% |
| Accurate 2700 | <<locked>> | 92% | 51,982 psi | 83% | 2339 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 32,909 psi | 53% | 2100 fps | 99.6% |
| Accurate 4350 | <<locked>> | 92% | 35,085 psi | 56% | 2201 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 50,720 psi | 81% | 2244 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,111 psi | 82% | 2267 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,754 psi | 62% | 2192 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 80% | 33,112 psi | 53% | 2067 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 50,807 psi | 81% | 2346 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,727 psi | 65% | 2201 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 80% | 39,929 psi | 64% | 2201 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,181 psi | 76% | 2369 fps | 99.6% |
| Alliant Power Pro 2000-MR | 56.7 gr | 80% | 34,867 psi | 56% | 2201 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,213 psi | 52% | 2087 fps | 96.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,776 psi | 77% | 2257 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,635 psi | 56% | 2133 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 92% | 36,347 psi | 58% | 2215 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 31,560 psi | 51% | 2139 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 98% | 30,763 psi | 49% | 2123 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,516 psi | 79% | 2247 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,594 psi | 60% | 2192 fps | 96.3% |
| Bofors RP3 | <<locked>> | 80% | 31,401 psi | 50% | 2083 fps | 96.8% |
| Bofors RP7 | <<locked>> | 96% | 47,848 psi | 77% | 2320 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,786 psi | 69% | 2198 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,812 psi | 62% | 2218 fps | 99.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,540 psi | 68% | 2329 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 80% | 46,557 psi | 75% | 2290 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,195 psi | 76% | 2313 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 37,072 psi | 59% | 2175 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 98% | 46,717 psi | 75% | 2392 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 98% | 51,416 psi | 82% | 2408 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 39,001 psi | 63% | 2201 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 31,125 psi | 50% | 2080 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,896 psi | 56% | 2175 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,817 psi | 41% | 1270 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,695 psi | 60% | 2165 fps | 98% |
| IMR 3031 | <<locked>> | 80% | 38,029 psi | 61% | 2205 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,708 psi | 56% | 2096 fps | 96.2% |
| IMR 4166 Enduron | <<locked>> | 88% | 47,674 psi | 76% | 2290 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 48,356 psi | 78% | 2224 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 46,949 psi | 75% | 2306 fps | 95.4% |
| IMR 4831 | <<locked>> | 92% | 34,243 psi | 55% | 2165 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 35,433 psi | 57% | 2162 fps | 97% |
| IMR 8208 XBR | <<locked>> | 80% | 40,727 psi | 65% | 2201 fps | 99.1% |
| Lovex D073.5 | <<locked>> | 80% | 45,571 psi | 73% | 2274 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 37,217 psi | 60% | 2178 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 39,523 psi | 63% | 2146 fps | 97.9% |
| Lovex S062 | <<locked>> | 80% | 34,432 psi | 55% | 2100 fps | 97.9% |
| Lovex S065 | <<locked>> | 92% | 40,611 psi | 65% | 2215 fps | 95.4% |
| Lovex S070 | <<locked>> | 98% | 46,064 psi | 74% | 2326 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 38,116 psi | 61% | 2159 fps | 98.7% |
| Norma 202 | <<locked>> | 80% | 38,145 psi | 61% | 2169 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 34,026 psi | 55% | 2126 fps | 96.5% |
| Norma URP | <<locked>> | 92% | 36,100 psi | 58% | 2208 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 33,460 psi | 54% | 2133 fps | 96% |
| Ramshot Hunter | <<locked>> | 98% | 42,786 psi | 69% | 2329 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 40,611 psi | 65% | 2201 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,740 psi | 64% | 2221 fps | 98% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,077 psi | 71% | 2244 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,150 psi | 42% | 1302 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,803 psi | 73% | 2277 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 42,888 psi | 69% | 2254 fps | 95.2% |
| ReloadSwiss RS 52 | 55 gr | 80% | 35,795 psi | 57% | 2215 fps | 96.5% |
| ReloadSwiss RS 60 | 55.8 gr | 80% | 29,559 psi | 47% | 2096 fps | 97.5% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 35,360 psi | 57% | 2221 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 41,394 psi | 66% | 2329 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 41,916 psi | 67% | 2198 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,187 psi | 58% | 2116 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 80% | 29,675 psi | 48% | 2037 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 96% | 47,848 psi | 77% | 2320 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 92% | 40,611 psi | 65% | 2215 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,217 psi | 60% | 2178 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 34,432 psi | 55% | 2100 fps | 97.9% |
| Shooters World SW4350 | <<locked>> | 98% | 46,064 psi | 74% | 2326 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,283 psi | 77% | 2290 fps | 99.7% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,126 psi | 82% | 2359 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 30,806 psi | 49% | 2077 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,457 psi | 78% | 2274 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,537 psi | 62% | 2175 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,333 psi | 60% | 2169 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,624 psi | 64% | 2123 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,590 psi | 52% | 2011 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 45,455 psi | 73% | 2257 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 43,671 psi | 70% | 2274 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 39,218 psi | 63% | 2129 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,290 psi | 61% | 2178 fps | 97.6% |
| Somchem S355 | <<locked>> | 80% | 30,763 psi | 49% | 2047 fps | 95.9% |
| Somchem S365 | <<locked>> | 86% | 26,687 psi | 43% | 2024 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 44,947 psi | 72% | 2182 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,769 psi | 64% | 2123 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,128 psi | 56% | 2110 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,100 psi | 58% | 2116 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 29,138 psi | 47% | 1995 fps | 96.8% |
| Vihtavuori N160 | <<locked>> | 90% | 35,578 psi | 57% | 2165 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 40,640 psi | 65% | 2198 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 80% | 34,606 psi | 55% | 2106 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 92% | 37,028 psi | 59% | 2215 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 98% | 32,300 psi | 52% | 2185 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 29,791 psi | 48% | 2014 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 39,581 psi | 63% | 2234 fps | 99.5% |
| Winchester 760 | <<locked>> | 98% | 46,949 psi | 75% | 2395 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,361 psi | 58% | 2169 fps | 97.8% |
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 HPFB. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,559 fps; across all powders the maximum-charge window runs from 1,424 fps to 2,559 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 52–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.375" calls for a 1:15.5 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 52, ReloadSwiss RS 60 rank at the top here: for .375 H&H Mag. with the .375 | 300gr | Frontier PH HPFB 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.