Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .375 | 300gr | Nosler Solid bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 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 2495 | <<locked>> | 84% | 42,583 psi | 90% | 2244 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 40,118 psi | 85% | 2241 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 40,973 psi | 87% | 2320 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 86% | 42,119 psi | 89% | 2254 fps | 98.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 42,467 psi | 90% | 2372 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 41,524 psi | 88% | 2274 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,061 psi | 89% | 2287 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 94% | 41,220 psi | 87% | 2333 fps | 97.7% |
| Alliant Reloder-17 | <<locked>> | 90% | 41,075 psi | 87% | 2359 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,940 psi | 74% | 2238 fps | 97.3% |
| Bofors RP3 | <<locked>> | 86% | 41,249 psi | 88% | 2280 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 86% | 42,438 psi | 90% | 2287 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 40,147 psi | 85% | 2277 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 39,958 psi | 85% | 2283 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,114 psi | 74% | 1450 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 42,540 psi | 90% | 2264 fps | 99.1% |
| IMR 4064 | <<locked>> | 84% | 41,771 psi | 89% | 2241 fps | 98.3% |
| IMR 4831 | <<locked>> | 96% | 42,177 psi | 89% | 2326 fps | 97.9% |
| IMR 4895 | <<locked>> | 82% | 40,437 psi | 86% | 2267 fps | 98.5% |
| Lovex S062 | <<locked>> | 84% | 41,481 psi | 88% | 2244 fps | 99.5% |
| Lovex S065 | <<locked>> | 90% | 40,770 psi | 86% | 2234 fps | 95.9% |
| Norma 203B | <<locked>> | 84% | 41,379 psi | 88% | 2277 fps | 98.6% |
| Norma URP | <<locked>> | 94% | 41,263 psi | 88% | 2320 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 84% | 40,872 psi | 87% | 2290 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,592 psi | 76% | 1486 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 41,147 psi | 87% | 2329 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 40,988 psi | 87% | 2362 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,741 psi | 86% | 2339 fps | 97.1% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,452 psi | 88% | 2352 fps | 96.4% |
| Rottweil R 902 | <<locked>> | 82% | 40,930 psi | 87% | 2215 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 88% | 41,321 psi | 88% | 2277 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,770 psi | 86% | 2234 fps | 95.9% |
| Shooters World Precision | <<locked>> | 84% | 41,481 psi | 88% | 2244 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 42,554 psi | 90% | 2326 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 42,337 psi | 90% | 2270 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 41,756 psi | 89% | 2182 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 42,177 psi | 89% | 2280 fps | 99.1% |
| Somchem S365 | <<locked>> | 98% | 41,858 psi | 89% | 2372 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 82% | 40,089 psi | 85% | 2198 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 40,988 psi | 87% | 2211 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 40,321 psi | 86% | 2224 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 92% | 40,611 psi | 86% | 2274 fps | 97.2% |
| Vihtavuori N540 | <<locked>> | 84% | 41,887 psi | 89% | 2244 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 42,525 psi | 90% | 2326 fps | 97.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,434 psi | 79% | 2306 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 41,002 psi | 87% | 2264 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 82% | 41,684 psi | 88% | 2277 fps | 99.1% |
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 2495 | <<locked>> | 80% | 37,376 psi | 79% | 2162 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 35,317 psi | 75% | 2156 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 33,460 psi | 71% | 2178 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 35,114 psi | 74% | 2123 fps | 96.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,188 psi | 79% | 2270 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,519 psi | 73% | 2146 fps | 97.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,072 psi | 79% | 2195 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,330 psi | 73% | 2188 fps | 95.4% |
| Alliant Reloder-17 | 59.6 gr | 80% | 29,733 psi | 63% | 2106 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,140 psi | 66% | 2149 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 33,808 psi | 72% | 2142 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 80% | 34,809 psi | 74% | 2142 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,472 psi | 63% | 2054 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,333 psi | 79% | 2234 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,092 psi | 55% | 1293 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,943 psi | 85% | 2221 fps | 98.7% |
| IMR 4064 | <<locked>> | 80% | 36,840 psi | 78% | 2152 fps | 97.1% |
| IMR 4831 | <<locked>> | 90% | 34,766 psi | 74% | 2188 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 37,956 psi | 81% | 2221 fps | 98% |
| Lovex S062 | <<locked>> | 80% | 36,593 psi | 78% | 2156 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 38,392 psi | 81% | 2192 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 36,492 psi | 77% | 2185 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 34,185 psi | 73% | 2182 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 35,810 psi | 76% | 2195 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,455 psi | 56% | 1325 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,348 psi | 81% | 2277 fps | 97.5% |
| ReloadSwiss RS 60 | 59.6 gr | 80% | 31,662 psi | 67% | 2165 fps | 98.6% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 35,607 psi | 76% | 2241 fps | 95.5% |
| ReloadSwiss RS 70 | 69.6 gr | 92% | 38,827 psi | 82% | 2300 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 38,450 psi | 82% | 2169 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 31,908 psi | 68% | 2096 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,392 psi | 81% | 2192 fps | 95.1% |
| Shooters World Precision | <<locked>> | 80% | 36,593 psi | 78% | 2156 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,822 psi | 70% | 2136 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,653 psi | 84% | 2224 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,708 psi | 74% | 2064 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 32,808 psi | 70% | 2100 fps | 96.9% |
| Somchem S365 | <<locked>> | 84% | 26,905 psi | 57% | 2044 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 37,695 psi | 80% | 2162 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,464 psi | 82% | 2169 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,227 psi | 66% | 2051 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 88% | 35,824 psi | 76% | 2185 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 36,869 psi | 78% | 2159 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 34,983 psi | 74% | 2185 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 96% | 32,982 psi | 70% | 2211 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,631 psi | 63% | 2028 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,015 psi | 83% | 2228 fps | 98.6% |
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 47 powders for .375 Fl. Mag. N.E. loaded with the .375 | 300gr | Nosler Solid. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,372 fps; across all powders the maximum-charge window runs from 1,450 fps to 2,372 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 47 of the 47 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 74–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ReloadSwiss RS 60, Alliant Reloder-17, ReloadSwiss RS 70 rank at the top here: for .375 Fl. Mag. N.E. with the .375 | 300gr | Nosler Solid 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.