Load Specifications
Bullet:.375 | 350gr | Woodleigh FMJ
Bullet Manufacturer:Woodleigh
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:1:6.0
Load data in caliber .375 H&H Mag. with .375 | 350gr | Woodleigh FMJ bullet and 106 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, Hodgdon Superformance 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>> | 84% | 55,187 psi | 88% | 2162 fps | 100% |
| Accurate 2495 | <<locked>> | 84% | 52,837 psi | 85% | 2196 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,621 psi | 86% | 2234 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 53,737 psi | 86% | 2208 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 41,307 psi | 66% | 2127 fps | 97.3% |
| Accurate 4064 | <<locked>> | 90% | 53,751 psi | 86% | 2234 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 52,968 psi | 85% | 2310 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 54,230 psi | 87% | 2260 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 54,969 psi | 88% | 2259 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 49,690 psi | 80% | 2250 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,229 psi | 85% | 2215 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,998 psi | 87% | 2187 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,316 psi | 85% | 2358 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 47,848 psi | 77% | 2247 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,868 psi | 88% | 2276 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,622 psi | 89% | 2297 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,375 psi | 87% | 2351 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,419 psi | 89% | 2383 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 48,167 psi | 77% | 2240 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,218 psi | 63% | 2154 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,018 psi | 69% | 2285 fps | 99.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,621 psi | 86% | 2275 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 55,434 psi | 89% | 2289 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,651 psi | 89% | 2273 fps | 98.6% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,897 psi | 88% | 2198 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,869 psi | 90% | 2283 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,288 psi | 87% | 2326 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 53,287 psi | 85% | 2195 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 52,953 psi | 85% | 2262 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 53,708 psi | 86% | 2328 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 98% | 54,621 psi | 88% | 2293 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 86% | 54,752 psi | 88% | 2267 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,126 psi | 82% | 2251 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,824 psi | 86% | 2297 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 56,318 psi | 90% | 2388 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,289 psi | 58% | 1336 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,737 psi | 88% | 2254 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 53,214 psi | 85% | 2228 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,911 psi | 86% | 2238 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 92% | 53,359 psi | 86% | 2217 fps | 98.7% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,753 psi | 89% | 2297 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,230 psi | 87% | 2257 fps | 98.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,659 psi | 76% | 2228 fps | 99.7% |
| IMR 4895 | <<locked>> | 88% | 53,490 psi | 86% | 2278 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 53,229 psi | 85% | 2216 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,621 psi | 86% | 2236 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,896 psi | 86% | 2199 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,331 psi | 87% | 2239 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,519 psi | 86% | 2251 fps | 99.5% |
| Lovex S070 | <<locked>> | 98% | 54,114 psi | 87% | 2280 fps | 99% |
| Norma 201 | <<locked>> | 88% | 56,231 psi | 90% | 2249 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,447 psi | 86% | 2211 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,781 psi | 88% | 2285 fps | 100% |
| Norma 204 | <<locked>> | 98% | 52,547 psi | 84% | 2293 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 43,453 psi | 70% | 2251 fps | 96.9% |
| Norma URP | <<locked>> | 98% | 52,011 psi | 83% | 2299 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 90% | 55,172 psi | 88% | 2309 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,911 psi | 88% | 2345 fps | 99.5% |
| Ramshot TAC | <<locked>> | 84% | 53,272 psi | 85% | 2239 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,391 psi | 90% | 2292 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,911 psi | 86% | 2219 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,246 psi | 60% | 1371 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,028 psi | 90% | 2234 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,359 psi | 86% | 2252 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,144 psi | 90% | 2352 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,303 psi | 89% | 2379 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 53,824 psi | 86% | 2331 fps | 99.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,811 psi | 89% | 2400 fps | 100% |
| Rottweil R 901 | <<locked>> | 84% | 54,085 psi | 87% | 2191 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,534 psi | 86% | 2211 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,230 psi | 89% | 2282 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 45,963 psi | 74% | 2225 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 96% | 55,651 psi | 89% | 2273 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,519 psi | 86% | 2251 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,621 psi | 86% | 2236 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,331 psi | 87% | 2239 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,114 psi | 87% | 2280 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,432 psi | 86% | 2295 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,100 psi | 88% | 2262 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,927 psi | 90% | 2278 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,650 psi | 88% | 2157 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,404 psi | 87% | 2157 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,490 psi | 86% | 2212 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 45,382 psi | 73% | 2221 fps | 96% |
| Somchem S321 | <<locked>> | 82% | 54,186 psi | 87% | 2244 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,911 psi | 86% | 2158 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,694 psi | 88% | 2252 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 55,608 psi | 89% | 2280 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,821 psi | 81% | 2301 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 46,601 psi | 75% | 2212 fps | 97.1% |
| Unknown powder | <<locked>> | 96% | 53,229 psi | 85% | 2305 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 82% | 53,417 psi | 86% | 2113 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,143 psi | 87% | 2138 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,301 psi | 85% | 2178 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 52,982 psi | 85% | 2186 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,491 psi | 87% | 2225 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 53,621 psi | 86% | 2279 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 56,304 psi | 90% | 2258 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,144 psi | 90% | 2251 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 53,896 psi | 86% | 2321 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,584 psi | 70% | 2214 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,071 psi | 88% | 2279 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,940 psi | 86% | 2261 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,708 psi | 86% | 2328 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,925 psi | 56% | 2170 fps | 99.7% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,718 psi | 78% | 2224 fps | 96.2% |
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% | 48,921 psi | 78% | 2093 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,586 psi | 75% | 2123 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,818 psi | 75% | 2156 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 41,582 psi | 67% | 2041 fps | 95.6% |
| Accurate 3100 | <<locked>> | 94% | 32,895 psi | 53% | 2000 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 39,378 psi | 63% | 2047 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 28,776 psi | 46% | 1919 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 45,034 psi | 72% | 2137 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 38,377 psi | 62% | 2022 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 98% | 46,702 psi | 75% | 2204 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,123 psi | 76% | 2139 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 47,558 psi | 76% | 2116 fps | 100% |
| Alliant Power Pro 2000-MR | 58.2 gr | 80% | 40,727 psi | 65% | 2172 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 45,121 psi | 72% | 2205 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,985 psi | 61% | 2041 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,770 psi | 65% | 2091 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 29,486 psi | 47% | 1927 fps | 95.6% |
| Alliant Reloder-17 | 57.3 gr | 80% | 32,590 psi | 52% | 2026 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 98% | 45,208 psi | 72% | 2199 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 86% | 25,541 psi | 41% | 1861 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 90% | 30,632 psi | 49% | 2038 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,019 psi | 71% | 2145 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 37,637 psi | 60% | 2046 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 38,479 psi | 62% | 2022 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,689 psi | 78% | 2122 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,745 psi | 73% | 2159 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,589 psi | 81% | 2280 fps | 100% |
| Hodgdon H322 | <<locked>> | 80% | 50,125 psi | 80% | 2159 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,247 psi | 61% | 2047 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 82% | 36,100 psi | 58% | 2056 fps | 95% |
| Hodgdon H4350 | <<locked>> | 90% | 42,960 psi | 69% | 2129 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 45,484 psi | 73% | 2145 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,079 psi | 43% | 1851 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,870 psi | 62% | 2090 fps | 99.8% |
| Hodgdon Superformance | 66.7 gr | 88% | 39,871 psi | 64% | 2146 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,542 psi | 43% | 1191 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,466 psi | 65% | 2060 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 41,539 psi | 67% | 2081 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,550 psi | 60% | 2001 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 37,391 psi | 60% | 1974 fps | 95.2% |
| IMR 4350 | <<locked>> | 88% | 38,508 psi | 62% | 2047 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 82% | 37,797 psi | 61% | 2011 fps | 95.3% |
| IMR 4831 | <<locked>> | 84% | 29,022 psi | 47% | 1909 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 41,771 psi | 67% | 2114 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 47,123 psi | 76% | 2138 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,063 psi | 71% | 2117 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,063 psi | 72% | 2083 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 40,190 psi | 64% | 2049 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 33,040 psi | 53% | 1929 fps | 95.4% |
| Lovex S070 | <<locked>> | 86% | 37,507 psi | 60% | 2033 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 44,150 psi | 71% | 2096 fps | 100% |
| Norma 202 | <<locked>> | 80% | 44,454 psi | 71% | 2099 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,147 psi | 64% | 2082 fps | 99.5% |
| Norma 204 | <<locked>> | 94% | 46,122 psi | 74% | 2203 fps | 95.7% |
| Norma MRP | <<locked>> | 96% | 37,782 psi | 61% | 2155 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 29,399 psi | 47% | 1921 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 39,436 psi | 63% | 2094 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 34,708 psi | 56% | 2038 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 46,717 psi | 75% | 2150 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,311 psi | 74% | 2166 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,488 psi | 81% | 2177 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,992 psi | 43% | 1222 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,576 psi | 84% | 2194 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,798 psi | 62% | 2037 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,699 psi | 68% | 2173 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,693 psi | 56% | 2075 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 30,501 psi | 49% | 1974 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 32,779 psi | 53% | 2022 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 48,080 psi | 77% | 2117 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,018 psi | 67% | 2058 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 35,447 psi | 57% | 2003 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 98% | 42,830 psi | 69% | 2179 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 84% | 38,479 psi | 62% | 2022 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,040 psi | 53% | 1929 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,063 psi | 71% | 2117 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,190 psi | 64% | 2049 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 37,507 psi | 60% | 2034 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,143 psi | 58% | 2041 fps | 98.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,078 psi | 72% | 2130 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,323 psi | 69% | 2113 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,498 psi | 73% | 2049 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,869 psi | 61% | 1949 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 36,405 psi | 58% | 1965 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 42,453 psi | 68% | 2175 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 50,720 psi | 81% | 2201 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,078 psi | 72% | 2052 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,802 psi | 72% | 2127 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 36,260 psi | 58% | 2006 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 26,339 psi | 42% | 1885 fps | 97.7% |
| Somchem S385 | <<locked>> | 96% | 40,799 psi | 65% | 2126 fps | 95.7% |
| Unknown powder | <<locked>> | 80% | 31,952 psi | 51% | 1964 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 50,343 psi | 81% | 2078 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,931 psi | 69% | 2004 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,582 psi | 67% | 2037 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,510 psi | 67% | 2041 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,995 psi | 50% | 1892 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 80% | 31,821 psi | 51% | 1943 fps | 96.3% |
| Vihtavuori N530 | <<locked>> | 80% | 49,632 psi | 80% | 2179 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,133 psi | 66% | 2061 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,126 psi | 52% | 1977 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 86% | 27,122 psi | 43% | 1919 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,342 psi | 49% | 1902 fps | 97.9% |
| Winchester 748 | <<locked>> | 80% | 50,357 psi | 81% | 2219 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 36,100 psi | 58% | 2056 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 90% | 25,382 psi | 41% | 1919 fps | 95.5% |
| Winchester Supreme 780 | <<locked>> | 98% | 46,311 psi | 74% | 2179 fps | 95.4% |
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 106 powders for .375 H&H Mag. loaded with the .375 | 350gr | Woodleigh FMJ. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,400 fps; across all powders the maximum-charge window runs from 1,336 fps to 2,400 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 350.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .375 H&H Mag. with the .375 | 350gr | Woodleigh FMJ 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.