Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .375 | 350gr | Barnes Banded Solid RN 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-17, Alliant Reloder-26 and Alliant Reloder-16.
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% | 39,015 psi | 83% | 2090 fps | 96.7% |
| Accurate 4064 | <<locked>> | 82% | 40,770 psi | 86% | 2051 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 41,887 psi | 89% | 2142 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 84% | 42,380 psi | 90% | 2070 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 41,930 psi | 89% | 2087 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,351 psi | 90% | 2100 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 92% | 41,597 psi | 88% | 2152 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 88% | 41,437 psi | 88% | 2172 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,811 psi | 80% | 2119 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,669 psi | 88% | 2244 fps | 98.7% |
| Bofors RP3 | <<locked>> | 84% | 41,814 psi | 89% | 2096 fps | 99.9% |
| Bofors RP7 | <<locked>> | 88% | 42,554 psi | 90% | 2070 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 82% | 40,001 psi | 85% | 2057 fps | 98% |
| Hodgdon H414 | <<locked>> | 90% | 41,872 psi | 89% | 2139 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 40,814 psi | 87% | 2100 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,563 psi | 75% | 1322 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 41,887 psi | 89% | 2054 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 41,727 psi | 89% | 2057 fps | 96.1% |
| IMR 4831 | <<locked>> | 92% | 40,306 psi | 86% | 2103 fps | 98.7% |
| Lovex S062 | <<locked>> | 82% | 41,727 psi | 89% | 2054 fps | 99.9% |
| Lovex S065 | <<locked>> | 88% | 41,060 psi | 87% | 2057 fps | 97.5% |
| Lovex S070 | <<locked>> | 90% | 41,481 psi | 88% | 2080 fps | 96.5% |
| Norma 203B | <<locked>> | 82% | 41,698 psi | 88% | 2090 fps | 99.5% |
| Norma MRPᴾ | <<locked>> | 100% | 41,930 psi | 89% | 2208 fps | 96.1% |
| Norma URP | <<locked>> | 92% | 41,858 psi | 89% | 2139 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 82% | 41,234 psi | 87% | 2106 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 92% | 40,930 psi | 87% | 2133 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,984 psi | 76% | 1355 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 40,408 psi | 86% | 2044 fps | 96.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 41,365 psi | 88% | 2175 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 41,423 psi | 88% | 2159 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 41,611 psi | 88% | 2172 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 86% | 41,916 psi | 89% | 2093 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 88% | 42,554 psi | 90% | 2070 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,060 psi | 87% | 2057 fps | 97.5% |
| Shooters World Precision | <<locked>> | 82% | 41,727 psi | 89% | 2054 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 41,481 psi | 88% | 2080 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 40,321 psi | 86% | 2096 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 41,916 psi | 89% | 1991 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 40,625 psi | 86% | 2014 fps | 96% |
| Somchem S355 | <<locked>> | 86% | 42,569 psi | 90% | 2093 fps | 99.8% |
| Somchem S365 | <<locked>> | 96% | 42,540 psi | 90% | 2185 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 42,308 psi | 90% | 2129 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 86% | 40,770 psi | 86% | 2041 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 41,249 psi | 88% | 2096 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 42,134 psi | 89% | 2054 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 40,509 psi | 86% | 2103 fps | 98.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,002 psi | 87% | 2175 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 41,031 psi | 87% | 2080 fps | 99.7% |
| Winchester 760 | <<locked>> | 90% | 42,090 psi | 89% | 2142 fps | 96.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,649 psi | 71% | 2123 fps | 99.3% |
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% | 34,214 psi | 73% | 2008 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 38,319 psi | 81% | 2014 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 29,834 psi | 63% | 1926 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 37,492 psi | 80% | 1988 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,072 psi | 79% | 2008 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,856 psi | 85% | 2057 fps | 99% |
| Alliant Reloder-16 | 53.3 gr | 82% | 30,748 psi | 65% | 1936 fps | 95.8% |
| Alliant Reloder-17 | 56 gr | 80% | 31,908 psi | 68% | 1991 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 88% | 26,382 psi | 56% | 1867 fps | 95.3% |
| Alliant Reloder-26 | 66 gr | 92% | 31,879 psi | 68% | 2047 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 36,695 psi | 78% | 2014 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 40,030 psi | 85% | 2031 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 37,391 psi | 79% | 2014 fps | 97.4% |
| Hodgdon H414 | <<locked>> | 88% | 39,392 psi | 84% | 2096 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,368 psi | 56% | 1818 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,498 psi | 56% | 1178 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,363 psi | 84% | 2014 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 39,320 psi | 83% | 2018 fps | 95.4% |
| IMR 4831 | <<locked>> | 82% | 29,254 psi | 62% | 1896 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 39,247 psi | 83% | 2014 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 34,258 psi | 73% | 1936 fps | 95.5% |
| Lovex S070 | <<locked>> | 86% | 36,738 psi | 78% | 2001 fps | 95% |
| Norma 203B | <<locked>> | 80% | 39,218 psi | 83% | 2047 fps | 99.2% |
| Norma MRP | <<locked>> | 98% | 39,262 psi | 83% | 2162 fps | 95.2% |
| Norma URP | <<locked>> | 82% | 30,487 psi | 65% | 1926 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 38,638 psi | 82% | 2064 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 35,998 psi | 76% | 2044 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,774 psi | 57% | 1207 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,840 psi | 80% | 2001 fps | 95.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,953 psi | 72% | 2041 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 31,705 psi | 67% | 1982 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 34,185 psi | 73% | 2031 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 34,490 psi | 73% | 1969 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 40,030 psi | 85% | 2031 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 82% | 34,258 psi | 73% | 1936 fps | 95.5% |
| Shooters World Precision | <<locked>> | 80% | 39,247 psi | 83% | 2014 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 36,738 psi | 78% | 2001 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,346 psi | 75% | 2008 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,130 psi | 79% | 1923 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 37,956 psi | 81% | 1972 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 35,375 psi | 75% | 1972 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 25,672 psi | 54% | 1850 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 39,755 psi | 84% | 2090 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 33,620 psi | 71% | 1923 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 29,921 psi | 63% | 1886 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 39,450 psi | 84% | 2014 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 31,227 psi | 66% | 1932 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 88% | 28,123 psi | 60% | 1926 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,689 psi | 63% | 1870 fps | 97.3% |
| Winchester 760 | <<locked>> | 88% | 39,392 psi | 84% | 2096 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 92% | 26,310 psi | 56% | 1926 fps | 95.6% |
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 | Barnes Banded Solid RN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,244 fps; across all powders the maximum-charge window runs from 1,322 fps to 2,244 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 71–90 %, 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, Alliant Reloder-23, Alliant Reloder-26 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-17, Alliant Reloder-26, Alliant Reloder-16 rank at the top here: for .375 Fl. Mag. N.E. with the .375 | 350gr | Barnes Banded Solid RN 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.