Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .374 | 340gr | Rhino Solid Shank bullet and 42 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Somchem S365 and ReloadSwiss RS 70.
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 3100ᴾ | <<locked>> | 100% | 40,263 psi | 85% | 2156 fps | 97% |
| Accurate 4064 | <<locked>> | 82% | 41,858 psi | 89% | 2116 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 40,234 psi | 85% | 2165 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 82% | 40,611 psi | 86% | 2090 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 40,422 psi | 86% | 2113 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 42,438 psi | 90% | 2215 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 88% | 42,380 psi | 90% | 2238 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,754 psi | 82% | 2182 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 40,132 psi | 85% | 2267 fps | 98.3% |
| Bofors RP3 | <<locked>> | 82% | 40,190 psi | 85% | 2119 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 82% | 40,959 psi | 87% | 2123 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 88% | 40,234 psi | 85% | 2162 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 41,843 psi | 89% | 2165 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,636 psi | 76% | 1362 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,569 psi | 90% | 2119 fps | 96.3% |
| IMR 4831 | <<locked>> | 92% | 41,336 psi | 88% | 2169 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 42,061 psi | 89% | 2123 fps | 97.7% |
| Lovex S070 | <<locked>> | 90% | 42,366 psi | 90% | 2146 fps | 96.7% |
| Norma 203B | <<locked>> | 82% | 42,612 psi | 90% | 2152 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 40,263 psi | 85% | 2162 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 82% | 42,293 psi | 90% | 2169 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 92% | 41,901 psi | 89% | 2198 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,216 psi | 77% | 1398 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,234 psi | 87% | 2106 fps | 96.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 42,380 psi | 90% | 2241 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 39,798 psi | 84% | 2182 fps | 98.3% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 42,598 psi | 90% | 2241 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 84% | 40,277 psi | 85% | 2116 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,061 psi | 89% | 2123 fps | 97.7% |
| Shooters World SW4350 | <<locked>> | 90% | 42,366 psi | 90% | 2146 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 41,205 psi | 87% | 2159 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 40,263 psi | 85% | 2014 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 41,553 psi | 88% | 2077 fps | 96.2% |
| Somchem S355 | <<locked>> | 84% | 40,901 psi | 87% | 2113 fps | 99.6% |
| Somchem S365 | <<locked>> | 94% | 41,104 psi | 87% | 2211 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 41,698 psi | 88% | 2103 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 42,177 psi | 89% | 2159 fps | 98.7% |
| Vihtavuori N550 | <<locked>> | 90% | 41,481 psi | 88% | 2165 fps | 98.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,467 psi | 90% | 2244 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 42,003 psi | 89% | 2146 fps | 99.8% |
| Winchester 760 | <<locked>> | 88% | 40,422 psi | 86% | 2162 fps | 96.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,606 psi | 73% | 2195 fps | 99.6% |
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 3100 | <<locked>> | 96% | 35,172 psi | 75% | 2067 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 39,291 psi | 83% | 2077 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 28,660 psi | 61% | 1939 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 38,290 psi | 81% | 2051 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,927 psi | 80% | 2070 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 29,573 psi | 63% | 1952 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,677 psi | 69% | 2054 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,079 psi | 57% | 1926 fps | 95.7% |
| Alliant Reloder-26 | 69.3 gr | 92% | 32,822 psi | 70% | 2113 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 37,463 psi | 79% | 2073 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 80% | 38,261 psi | 81% | 2077 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 37,782 psi | 80% | 2116 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,021 psi | 57% | 1873 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,600 psi | 56% | 1214 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,030 psi | 85% | 2077 fps | 95.6% |
| IMR 4831 | <<locked>> | 82% | 30,037 psi | 64% | 1955 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 32,982 psi | 70% | 1955 fps | 95% |
| Lovex S070 | <<locked>> | 86% | 37,550 psi | 80% | 2060 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 40,016 psi | 85% | 2110 fps | 99.3% |
| Norma URP | <<locked>> | 80% | 29,327 psi | 62% | 1946 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 39,523 psi | 84% | 2126 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 34,708 psi | 74% | 2064 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,861 psi | 57% | 1243 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,783 psi | 82% | 2064 fps | 96.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,795 psi | 74% | 2106 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 30,560 psi | 65% | 2001 fps | 95.3% |
| ReloadSwiss RS 70 | 62.7 gr | 84% | 32,880 psi | 70% | 2051 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 35,302 psi | 75% | 2031 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 32,982 psi | 70% | 1955 fps | 95% |
| Shooters World SW4350 | <<locked>> | 86% | 37,550 psi | 80% | 2060 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,303 psi | 77% | 2073 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,884 psi | 80% | 1978 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 38,972 psi | 83% | 2034 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 36,172 psi | 77% | 2034 fps | 99% |
| Somchem S365 | 55.7 gr | 80% | 26,252 psi | 56% | 1906 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 80% | 34,374 psi | 73% | 1982 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 30,574 psi | 65% | 1946 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 29,965 psi | 64% | 1946 fps | 95% |
| Vihtavuori N555 | <<locked>> | 88% | 28,863 psi | 61% | 1985 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,414 psi | 65% | 1929 fps | 97.6% |
| Winchester 760 | <<locked>> | 86% | 37,942 psi | 80% | 2119 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 92% | 26,919 psi | 57% | 1988 fps | 96.1% |
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 42 powders for .375 Fl. Mag. N.E. loaded with the .374 | 340gr | Rhino Solid Shank. Alliant Reloder-26 delivers the highest muzzle velocity at 2,267 fps; across all powders the maximum-charge window runs from 1,362 fps to 2,267 fps. Accurate 3100 gives the best case fill at 100 %, and 42 of the 42 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 73–90 %, leaving at least 10 % headroom. The 340.0 gr projectile in 0.374" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Hodgdon TrailBoss 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, Somchem S365, ReloadSwiss RS 70 rank at the top here: for .375 Fl. Mag. N.E. with the .374 | 340gr | Rhino Solid Shank 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.