Load Specifications
Bullet Manufacturer:North Fork
Bullet Weight:350 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:1:16.0
Load data in caliber .375 H&H Mag. with .375 | 350gr | North Fork Semi Spitz 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, Alliant Reloder-17 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>> | 86% | 56,434 psi | 90% | 2162 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,708 psi | 88% | 2188 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,607 psi | 88% | 2185 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 52,939 psi | 85% | 2201 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,041 psi | 87% | 2195 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 37,985 psi | 61% | 2077 fps | 96.4% |
| Accurate 4064 | <<locked>> | 92% | 54,534 psi | 87% | 2228 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,592 psi | 86% | 2300 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 88% | 55,463 psi | 89% | 2257 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 56,217 psi | 90% | 2254 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,621 psi | 88% | 2215 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,114 psi | 88% | 2185 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 56,362 psi | 90% | 2297 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,636 psi | 88% | 2356 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,028 psi | 90% | 2270 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,130 psi | 90% | 2159 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,388 psi | 86% | 2254 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,895 psi | 83% | 2303 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,347 psi | 90% | 2375 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,956 psi | 59% | 2103 fps | 99.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,669 psi | 65% | 2228 fps | 98.4% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,100 psi | 88% | 2274 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 52,939 psi | 85% | 2244 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 53,301 psi | 85% | 2224 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,362 psi | 90% | 2195 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,417 psi | 86% | 2241 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,477 psi | 89% | 2323 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 55,245 psi | 89% | 2201 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,101 psi | 90% | 2228 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,143 psi | 87% | 2260 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 98% | 53,200 psi | 85% | 2303 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 96% | 54,331 psi | 87% | 2270 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 88% | 55,985 psi | 90% | 2264 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,138 psi | 77% | 2205 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,897 psi | 88% | 2293 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 53,882 psi | 86% | 2336 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,346 psi | 57% | 1316 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,809 psi | 86% | 2224 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,738 psi | 89% | 2241 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,767 psi | 89% | 2238 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,144 psi | 90% | 2231 fps | 98.8% |
| IMR 4198 | <<locked>> | 82% | 56,246 psi | 90% | 2123 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,374 psi | 86% | 2247 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,463 psi | 89% | 2251 fps | 98.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,778 psi | 81% | 2254 fps | 99.8% |
| IMR 4895 | <<locked>> | 90% | 54,723 psi | 88% | 2274 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 54,621 psi | 88% | 2215 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,752 psi | 88% | 2201 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,868 psi | 88% | 2234 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,129 psi | 88% | 2195 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 55,608 psi | 89% | 2238 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,404 psi | 87% | 2244 fps | 99.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,129 psi | 88% | 2270 fps | 98.9% |
| Norma 201 | <<locked>> | 88% | 54,114 psi | 87% | 2208 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,549 psi | 87% | 2208 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,941 psi | 90% | 2280 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 53,896 psi | 86% | 2287 fps | 96.9% |
| Norma URPᴾ | <<locked>> | 100% | 52,823 psi | 85% | 2290 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 92% | 56,304 psi | 90% | 2306 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,764 psi | 83% | 2293 fps | 99% |
| Ramshot TAC | <<locked>> | 86% | 54,737 psi | 88% | 2238 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,114 psi | 87% | 2247 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,521 psi | 89% | 2221 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,969 psi | 58% | 1352 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,041 psi | 87% | 2195 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,505 psi | 87% | 2244 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,447 psi | 86% | 2303 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 56,420 psi | 90% | 2375 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,171 psi | 85% | 2323 fps | 99.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,200 psi | 85% | 2346 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 86% | 55,187 psi | 88% | 2188 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,708 psi | 88% | 2208 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 56,260 psi | 90% | 2277 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 53,301 psi | 85% | 2224 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,404 psi | 87% | 2244 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,868 psi | 88% | 2234 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,608 psi | 89% | 2238 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,129 psi | 88% | 2270 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,476 psi | 87% | 2290 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,084 psi | 85% | 2218 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,563 psi | 86% | 2234 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,854 psi | 90% | 2152 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,898 psi | 90% | 2156 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,955 psi | 88% | 2208 fps | 98.6% |
| Somchem S321 | <<locked>> | 84% | 55,506 psi | 89% | 2241 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,056 psi | 88% | 2152 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,260 psi | 90% | 2254 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 53,447 psi | 86% | 2238 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,340 psi | 76% | 2254 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 44,005 psi | 71% | 2159 fps | 96.2% |
| Vihtavuori N130 | <<locked>> | 84% | 55,898 psi | 90% | 2119 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,014 psi | 90% | 2139 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,288 psi | 87% | 2175 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,998 psi | 88% | 2188 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,650 psi | 88% | 2218 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,448 psi | 89% | 2287 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 86% | 55,042 psi | 88% | 2215 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 53,243 psi | 85% | 2195 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,230 psi | 87% | 2293 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,871 psi | 64% | 2162 fps | 99.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,956 psi | 90% | 2270 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,665 psi | 88% | 2254 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,461 psi | 86% | 2306 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,996 psi | 53% | 2110 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,374 psi | 86% | 2241 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% | 47,195 psi | 76% | 2057 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,401 psi | 82% | 2152 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,682 psi | 64% | 2005 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,412 psi | 74% | 2126 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 41,916 psi | 67% | 2028 fps | 95.3% |
| Accurate 3100 | <<locked>> | 98% | 35,505 psi | 57% | 2034 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 37,550 psi | 60% | 2005 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 29,051 psi | 47% | 1913 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 43,163 psi | 69% | 2093 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 36,854 psi | 59% | 1978 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,237 psi | 73% | 2096 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 45,368 psi | 73% | 2077 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,910 psi | 85% | 2254 fps | 100% |
| Alliant Power Pro 2000-MR | 55.8 gr | 80% | 39,218 psi | 63% | 2126 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,361 psi | 58% | 1998 fps | 99.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,997 psi | 85% | 2126 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,957 psi | 62% | 2044 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 30,095 psi | 48% | 1923 fps | 95.5% |
| Alliant Reloder-17 | 54.9 gr | 80% | 31,270 psi | 50% | 1982 fps | 97.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 25,875 psi | 41% | 1854 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 94% | 33,257 psi | 53% | 2080 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,206 psi | 68% | 2100 fps | 98.9% |
| Bofors RP3 | <<locked>> | 80% | 35,795 psi | 57% | 2001 fps | 99.3% |
| Bofors RP7 | <<locked>> | 88% | 41,858 psi | 67% | 2060 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,079 psi | 75% | 2083 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,961 psi | 70% | 2119 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,399 psi | 78% | 2234 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 80% | 51,851 psi | 83% | 2162 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,518 psi | 84% | 2188 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,767 psi | 59% | 2005 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 88% | 38,522 psi | 62% | 2083 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 90% | 44,976 psi | 72% | 2142 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 43,569 psi | 70% | 2100 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 25,875 psi | 41% | 1808 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,523 psi | 63% | 2087 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 90% | 40,799 psi | 65% | 2142 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,339 psi | 42% | 1175 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,974 psi | 67% | 2067 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 43,308 psi | 69% | 2093 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,696 psi | 62% | 2005 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,017 psi | 66% | 2018 fps | 96% |
| IMR 4198 | <<locked>> | 80% | 53,055 psi | 85% | 2087 fps | 100% |
| IMR 4350 | <<locked>> | 92% | 41,829 psi | 67% | 2083 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 38,595 psi | 62% | 2005 fps | 95.1% |
| IMR 4831 | <<locked>> | 82% | 28,529 psi | 46% | 1883 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 39,900 psi | 64% | 2070 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 45,237 psi | 73% | 2096 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 50,952 psi | 82% | 2159 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,134 psi | 68% | 2077 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,453 psi | 70% | 2041 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 38,537 psi | 62% | 2008 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 33,678 psi | 54% | 1926 fps | 95.3% |
| Lovex S070 | <<locked>> | 88% | 38,116 psi | 61% | 2028 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 42,424 psi | 68% | 2054 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 42,670 psi | 68% | 2060 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,334 psi | 61% | 2037 fps | 99.1% |
| Norma 204 | <<locked>> | 96% | 47,224 psi | 76% | 2198 fps | 95.5% |
| Norma URP | <<locked>> | 82% | 29,936 psi | 48% | 1919 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 37,826 psi | 61% | 2051 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 35,259 psi | 57% | 2031 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 45,005 psi | 72% | 2106 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,469 psi | 71% | 2123 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,863 psi | 78% | 2139 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,789 psi | 43% | 1204 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,821 psi | 81% | 2159 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,101 psi | 59% | 1988 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,640 psi | 65% | 2126 fps | 99.1% |
| ReloadSwiss RS 60 | 54.9 gr | 80% | 33,257 psi | 53% | 2031 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 31,067 psi | 50% | 1972 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 33,489 psi | 54% | 2018 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 46,398 psi | 74% | 2080 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,495 psi | 65% | 2021 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 33,837 psi | 54% | 1959 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 88% | 41,858 psi | 67% | 2060 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 33,678 psi | 54% | 1926 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,134 psi | 68% | 2077 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,537 psi | 62% | 2008 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 38,116 psi | 61% | 2028 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,577 psi | 55% | 1998 fps | 98.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,207 psi | 69% | 2087 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,611 psi | 67% | 2070 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,932 psi | 70% | 2011 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,434 psi | 58% | 1913 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 39,697 psi | 64% | 2001 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 48,747 psi | 78% | 2162 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,453 psi | 70% | 2014 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,975 psi | 69% | 2083 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 34,679 psi | 56% | 1962 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 25,193 psi | 40% | 1841 fps | 96.8% |
| Somchem S385 | <<locked>> | 98% | 41,292 psi | 66% | 2116 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 49,574 psi | 79% | 2054 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,208 psi | 71% | 2005 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,813 psi | 64% | 1998 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,437 psi | 65% | 2011 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,967 psi | 53% | 1913 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 82% | 31,169 psi | 50% | 1916 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 45,339 psi | 73% | 2093 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 38,827 psi | 62% | 2005 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 30,530 psi | 49% | 1919 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 88% | 27,354 psi | 44% | 1913 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,153 psi | 47% | 1860 fps | 97.1% |
| Winchester 748 | <<locked>> | 80% | 44,846 psi | 72% | 2133 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 38,522 psi | 62% | 2083 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 92% | 25,788 psi | 41% | 1913 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,089 psi | 66% | 2077 fps | 99.7% |
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 | 350gr | North Fork Semi Spitz. Alliant Reloder-17 delivers the highest muzzle velocity at 2,375 fps; across all powders the maximum-charge window runs from 1,316 fps to 2,375 fps. Accurate 3100 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 53–90 %, leaving at least 10 % headroom. The 350.0 gr projectile in 0.375" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .375 H&H Mag. with the .375 | 350gr | North Fork Semi Spitz 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.