Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .374 | 350gr | Rhino Solid Shank bullet and 45 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% | 40,408 psi | 86% | 2119 fps | 97.3% |
| Accurate 4064 | <<locked>> | 82% | 41,843 psi | 89% | 2073 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 40,277 psi | 85% | 2126 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 82% | 40,712 psi | 86% | 2054 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 40,524 psi | 86% | 2073 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 42,656 psi | 90% | 2178 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 88% | 42,525 psi | 90% | 2198 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,827 psi | 82% | 2146 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 40,103 psi | 85% | 2228 fps | 98.5% |
| Bofors RP3 | <<locked>> | 82% | 40,205 psi | 85% | 2080 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 82% | 40,988 psi | 87% | 2083 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 88% | 40,277 psi | 85% | 2123 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 41,930 psi | 89% | 2126 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 90% | 42,641 psi | 90% | 2185 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,578 psi | 75% | 1332 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,641 psi | 90% | 2083 fps | 96.5% |
| IMR 4831 | <<locked>> | 92% | 41,452 psi | 88% | 2129 fps | 99% |
| Lovex S062 | <<locked>> | 82% | 42,656 psi | 90% | 2077 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 42,192 psi | 90% | 2083 fps | 97.9% |
| Lovex S070 | <<locked>> | 90% | 42,569 psi | 90% | 2110 fps | 96.9% |
| Norma MRP | <<locked>> | 98% | 40,422 psi | 86% | 2195 fps | 95.9% |
| Norma URP | <<locked>> | 90% | 40,466 psi | 86% | 2126 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 82% | 42,235 psi | 90% | 2129 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 92% | 42,076 psi | 89% | 2162 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,172 psi | 77% | 1365 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,336 psi | 88% | 2070 fps | 97% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 42,438 psi | 90% | 2201 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 39,958 psi | 85% | 2146 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 39,871 psi | 85% | 2156 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 84% | 40,277 psi | 85% | 2077 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,192 psi | 90% | 2083 fps | 97.9% |
| Shooters World Precision | <<locked>> | 82% | 42,656 psi | 90% | 2077 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 42,569 psi | 90% | 2110 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 41,321 psi | 88% | 2119 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 40,277 psi | 85% | 1975 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 41,553 psi | 88% | 2041 fps | 96.4% |
| Somchem S355 | <<locked>> | 84% | 41,075 psi | 87% | 2077 fps | 99.7% |
| Somchem S365 | <<locked>> | 94% | 41,031 psi | 87% | 2169 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 41,800 psi | 89% | 2064 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 42,206 psi | 90% | 2119 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 90% | 41,582 psi | 88% | 2126 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,380 psi | 90% | 2205 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 42,032 psi | 89% | 2106 fps | 99.9% |
| Winchester 760 | <<locked>> | 88% | 40,480 psi | 86% | 2126 fps | 96.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,621 psi | 73% | 2159 fps | 99.7% |
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% | 35,230 psi | 75% | 2034 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 39,349 psi | 83% | 2037 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 28,747 psi | 61% | 1906 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 38,363 psi | 81% | 2014 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,956 psi | 81% | 2031 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 29,602 psi | 63% | 1919 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,721 psi | 69% | 2018 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 86% | 25,512 psi | 54% | 1850 fps | 95% |
| Alliant Reloder-26 | 66.1 gr | 90% | 30,603 psi | 65% | 2028 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 37,594 psi | 80% | 2037 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 80% | 38,406 psi | 81% | 2041 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 86% | 37,797 psi | 80% | 2077 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,064 psi | 57% | 1841 fps | 96.3% |
| Hodgdon Superformance | <<locked>> | 88% | 39,856 psi | 85% | 2136 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,513 psi | 56% | 1188 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 37,753 psi | 80% | 1998 fps | 95.1% |
| IMR 4831 | <<locked>> | 80% | 28,094 psi | 60% | 1877 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 40,190 psi | 85% | 2041 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 33,025 psi | 70% | 1919 fps | 95.2% |
| Lovex S070 | <<locked>> | 86% | 37,652 psi | 80% | 2024 fps | 95.6% |
| Norma MRP | <<locked>> | 96% | 37,898 psi | 80% | 2146 fps | 95% |
| Norma URP | <<locked>> | 80% | 29,385 psi | 62% | 1913 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 39,624 psi | 84% | 2087 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 34,693 psi | 74% | 2028 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,963 psi | 57% | 1217 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,783 psi | 82% | 2028 fps | 96.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,824 psi | 74% | 2067 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 30,501 psi | 65% | 1962 fps | 95.5% |
| ReloadSwiss RS 70 | 61.2 gr | 84% | 32,895 psi | 70% | 2014 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 35,404 psi | 75% | 1995 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,025 psi | 70% | 1919 fps | 95.2% |
| Shooters World Precision | <<locked>> | 80% | 40,190 psi | 85% | 2041 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 37,652 psi | 80% | 2024 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,289 psi | 77% | 2034 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,869 psi | 80% | 1939 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 38,899 psi | 83% | 1998 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 36,230 psi | 77% | 1995 fps | 99.1% |
| Somchem S365 | 54.4 gr | 80% | 26,324 psi | 56% | 1873 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 80% | 34,418 psi | 73% | 1946 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 30,647 psi | 65% | 1913 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 30,110 psi | 64% | 1916 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 86% | 27,093 psi | 57% | 1909 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,501 psi | 65% | 1896 fps | 97.8% |
| Winchester 760 | <<locked>> | 86% | 37,927 psi | 80% | 2080 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 90% | 25,338 psi | 54% | 1906 fps | 95.2% |
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 45 powders for .375 Fl. Mag. N.E. loaded with the .374 | 350gr | Rhino Solid Shank. Alliant Reloder-26 delivers the highest muzzle velocity at 2,228 fps; across all powders the maximum-charge window runs from 1,332 fps to 2,228 fps. Accurate 3100 gives the best case fill at 100 %, and 45 of the 45 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 350.0 gr projectile in 0.374" calls for a 1:17.0 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 | 350gr | 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.