Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .375 | 350gr | Woodleigh FMJ bullet and 51 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and ReloadSwiss RS 62.
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.
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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 84% | 42,554 psi | 90% | 2057 fps | 95.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,221 psi | 90% | 2158 fps | 97.8% |
| Accurate 4350 | <<locked>> | 90% | 41,756 psi | 89% | 2156 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 82% | 41,771 psi | 89% | 2086 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 41,437 psi | 88% | 2104 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 90% | 41,075 psi | 87% | 2171 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 86% | 40,901 psi | 87% | 2190 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,756 psi | 86% | 2184 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 35,621 psi | 76% | 2104 fps | 96.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 42,424 psi | 90% | 2272 fps | 99% |
| Bofors RP3 | <<locked>> | 82% | 41,278 psi | 88% | 2112 fps | 99.9% |
| Bofors RP7 | <<locked>> | 86% | 42,119 psi | 89% | 2092 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 82% | 42,032 psi | 89% | 2117 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 86% | 42,322 psi | 90% | 2174 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 40,495 psi | 86% | 2121 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 41,017 psi | 87% | 2175 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,782 psi | 78% | 1349 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 40,988 psi | 87% | 2060 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 82% | 40,596 psi | 86% | 2039 fps | 96.4% |
| IMR 4350 | <<locked>> | 90% | 42,003 psi | 89% | 2106 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,104 psi | 87% | 2067 fps | 96.3% |
| IMR 4831 | <<locked>> | 94% | 40,843 psi | 87% | 2137 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 40,698 psi | 86% | 2077 fps | 97.8% |
| Lovex S070 | <<locked>> | 88% | 41,017 psi | 87% | 2101 fps | 96.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 35,476 psi | 75% | 2042 fps | 96% |
| Norma MRP | <<locked>> | 98% | 42,554 psi | 90% | 2237 fps | 96.7% |
| Norma URP | <<locked>> | 90% | 41,655 psi | 88% | 2160 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 90% | 40,422 psi | 86% | 2152 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,304 psi | 79% | 1380 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,424 psi | 90% | 2105 fps | 97.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 40,857 psi | 87% | 2192 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 41,263 psi | 88% | 2182 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 41,046 psi | 87% | 2195 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 84% | 41,379 psi | 88% | 2108 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 42,119 psi | 89% | 2092 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 40,698 psi | 86% | 2077 fps | 97.8% |
| Shooters World SW4350 | <<locked>> | 88% | 41,017 psi | 87% | 2093 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 42,496 psi | 90% | 2154 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 41,162 psi | 87% | 2003 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 42,627 psi | 90% | 2073 fps | 97% |
| Somchem S355 | <<locked>> | 84% | 42,134 psi | 89% | 2110 fps | 99.9% |
| Somchem S365 | <<locked>> | 94% | 42,322 psi | 90% | 2205 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 42,076 psi | 89% | 2153 fps | 96.3% |
| Unknown powder | <<locked>> | 88% | 42,438 psi | 90% | 2163 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 88% | 40,712 psi | 86% | 2066 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 39,842 psi | 85% | 2097 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 86% | 40,350 psi | 86% | 2136 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 98% | 41,104 psi | 87% | 2199 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 40,480 psi | 86% | 2098 fps | 99.9% |
| Winchester 760 | <<locked>> | 86% | 42,322 psi | 90% | 2174 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,129 psi | 77% | 2204 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 40,045 psi | 85% | 2014 fps | 95.2% |
| Accurate 3100 | <<locked>> | 94% | 34,214 psi | 73% | 2030 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 29,776 psi | 63% | 1936 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 39,204 psi | 83% | 2044 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,899 psi | 83% | 2063 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,327 psi | 64% | 1954 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,562 psi | 71% | 2053 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 84% | 24,743 psi | 52% | 1846 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 98% | 33,214 psi | 70% | 2059 fps | 95.4% |
| Alliant Reloder-26 | 67.9 gr | 90% | 31,604 psi | 67% | 2070 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 38,696 psi | 82% | 2070 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 39,537 psi | 84% | 2049 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 39,421 psi | 84% | 2074 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 82% | 37,086 psi | 79% | 2083 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,760 psi | 59% | 1875 fps | 97% |
| Hodgdon Superformance | <<locked>> | 86% | 38,232 psi | 81% | 2124 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,629 psi | 56% | 1200 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,435 psi | 82% | 2018 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 38,334 psi | 81% | 1999 fps | 95.7% |
| IMR 4350 | <<locked>> | 88% | 39,479 psi | 84% | 2064 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 38,682 psi | 82% | 2028 fps | 95.6% |
| IMR 4831 | <<locked>> | 82% | 28,065 psi | 60% | 1891 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 33,794 psi | 72% | 1952 fps | 95.8% |
| Lovex S070 | <<locked>> | 84% | 36,230 psi | 77% | 2016 fps | 95.4% |
| Lovex S071 | <<locked>> | 98% | 33,054 psi | 70% | 2002 fps | 95.2% |
| Norma MRP | <<locked>> | 94% | 36,651 psi | 78% | 2142 fps | 95% |
| Norma URP | <<locked>> | 80% | 30,168 psi | 64% | 1944 fps | 96% |
| Ramshot Hunter | <<locked>> | 84% | 33,504 psi | 71% | 2020 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,079 psi | 57% | 1231 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,711 psi | 84% | 2060 fps | 96.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,694 psi | 76% | 2101 fps | 100% |
| ReloadSwiss RS 62 | 58.8 gr | 80% | 29,414 psi | 62% | 1955 fps | 95.4% |
| ReloadSwiss RS 70 | 61.3 gr | 82% | 31,589 psi | 67% | 2003 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 36,332 psi | 77% | 2025 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 39,537 psi | 84% | 2049 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,794 psi | 72% | 1952 fps | 95.8% |
| Shooters World SW4350 | <<locked>> | 84% | 36,230 psi | 77% | 2008 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,289 psi | 79% | 2068 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,798 psi | 82% | 1969 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 37,463 psi | 79% | 1990 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 37,130 psi | 79% | 2028 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 27,137 psi | 58% | 1911 fps | 98.2% |
| Somchem S385 | <<locked>> | 94% | 39,494 psi | 84% | 2111 fps | 95.5% |
| Unknown powder | <<locked>> | 80% | 32,851 psi | 70% | 1990 fps | 96.3% |
| Vihtavuori N150 | <<locked>> | 80% | 31,865 psi | 68% | 1914 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 32,692 psi | 69% | 1968 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 80% | 33,214 psi | 70% | 2005 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 84% | 26,324 psi | 56% | 1904 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,154 psi | 66% | 1927 fps | 98.3% |
| Winchester 760 | <<locked>> | 82% | 37,086 psi | 79% | 2083 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 88% | 24,569 psi | 52% | 1901 fps | 95.1% |
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 51 powders for .375 Fl. Mag. N.E. loaded with the .375 | 350gr | Woodleigh FMJ. Alliant Reloder-26 delivers the highest muzzle velocity at 2,272 fps; across all powders the maximum-charge window runs from 1,349 fps to 2,272 fps. Accurate 3100 gives the best case fill at 100 %, and 51 of the 51 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 75–90 %, 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, Alliant Reloder-23, Alliant Reloder-25 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 Reloder-26, ReloadSwiss RS 70, ReloadSwiss RS 62 rank at the top here: for .375 Fl. Mag. N.E. 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.