Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .375 | 300gr | Barnes TSX FB bullet and 61 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 62, Alliant Reloder-16 and Accurate 4350.
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>> | 86% | 42,264 psi | 90% | 2244 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 42,395 psi | 90% | 2277 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 40,930 psi | 87% | 2320 fps | 97.4% |
| ADI AR 2206H | <<locked>> | 82% | 41,640 psi | 88% | 2257 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 86% | 40,118 psi | 85% | 2215 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 40,335 psi | 86% | 2326 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 41,727 psi | 89% | 2274 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 86% | 42,453 psi | 90% | 2290 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 96% | 41,437 psi | 88% | 2329 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 92% | 41,423 psi | 88% | 2359 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 32,779 psi | 70% | 2182 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 40,640 psi | 86% | 2257 fps | 97.3% |
| Bofors RP3 | <<locked>> | 88% | 41,278 psi | 88% | 2280 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 82% | 42,018 psi | 89% | 2283 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 86% | 39,798 psi | 84% | 2238 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 82% | 41,959 psi | 89% | 2267 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 40,248 psi | 85% | 2274 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 40,364 psi | 86% | 2287 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,838 psi | 74% | 1437 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 40,422 psi | 86% | 2224 fps | 98.7% |
| IMR 3031 | <<locked>> | 82% | 41,162 psi | 87% | 2264 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 42,134 psi | 89% | 2244 fps | 98.2% |
| IMR 4831 | <<locked>> | 98% | 42,148 psi | 89% | 2320 fps | 97.7% |
| IMR 4895 | <<locked>> | 84% | 40,712 psi | 86% | 2270 fps | 98.4% |
| Lovex D073.6 | <<locked>> | 82% | 39,972 psi | 85% | 2234 fps | 99.9% |
| Lovex S060 | <<locked>> | 82% | 42,366 psi | 90% | 2205 fps | 98.6% |
| Lovex S062 | <<locked>> | 86% | 41,568 psi | 88% | 2244 fps | 99.4% |
| Lovex S065 | <<locked>> | 92% | 40,886 psi | 87% | 2234 fps | 95.7% |
| Norma 201 | <<locked>> | 82% | 40,683 psi | 86% | 2215 fps | 99.2% |
| Norma 202 | <<locked>> | 82% | 40,930 psi | 87% | 2228 fps | 100% |
| Norma 203B | <<locked>> | 86% | 41,727 psi | 89% | 2280 fps | 98.6% |
| Norma URP | <<locked>> | 96% | 41,292 psi | 88% | 2316 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 86% | 41,234 psi | 87% | 2293 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,056 psi | 74% | 1473 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 41,524 psi | 88% | 2333 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 41,524 psi | 88% | 2369 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 40,770 psi | 86% | 2336 fps | 96.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 41,858 psi | 89% | 2349 fps | 96.3% |
| Rottweil R 902 | <<locked>> | 84% | 41,075 psi | 87% | 2215 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 90% | 41,162 psi | 87% | 2274 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 92% | 40,886 psi | 87% | 2234 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 39,972 psi | 85% | 2234 fps | 99.9% |
| Shooters World Precision | <<locked>> | 86% | 41,568 psi | 88% | 2244 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 40,147 psi | 85% | 2280 fps | 98.2% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 41,568 psi | 88% | 2241 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 40,030 psi | 85% | 2228 fps | 98.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 42,453 psi | 90% | 2178 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 42,163 psi | 89% | 2185 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 41,887 psi | 89% | 2182 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 41,408 psi | 88% | 2244 fps | 98.4% |
| Somchem S355 | <<locked>> | 90% | 42,351 psi | 90% | 2280 fps | 99% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,771 psi | 89% | 2365 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 84% | 40,234 psi | 85% | 2201 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 41,162 psi | 87% | 2211 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 40,422 psi | 86% | 2224 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 94% | 40,857 psi | 87% | 2274 fps | 97% |
| Vihtavuori N540 | <<locked>> | 86% | 42,177 psi | 89% | 2247 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 42,612 psi | 90% | 2323 fps | 97.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 34,795 psi | 74% | 2247 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 41,408 psi | 88% | 2264 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 42,047 psi | 89% | 2280 fps | 99% |
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% | 34,476 psi | 73% | 2116 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 32,677 psi | 69% | 2106 fps | 99.6% |
| Accurate 4350 | 63.5 gr | 92% | 35,462 psi | 75% | 2221 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 38,986 psi | 83% | 2208 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 33,257 psi | 71% | 2083 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 35,099 psi | 74% | 2218 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,285 psi | 68% | 2096 fps | 97.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,853 psi | 74% | 2149 fps | 96.3% |
| Alliant Reloder-16 | 60.5 gr | 90% | 34,490 psi | 73% | 2188 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 82% | 29,776 psi | 63% | 2106 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 98% | 30,922 psi | 66% | 2139 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,884 psi | 80% | 2208 fps | 96.6% |
| Bofors RP3 | <<locked>> | 80% | 31,386 psi | 67% | 2093 fps | 96.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,146 psi | 83% | 2234 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 84% | 37,231 psi | 79% | 2192 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 39,291 psi | 83% | 2218 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 29,486 psi | 63% | 2054 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,244 psi | 75% | 2192 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,759 psi | 55% | 1280 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,869 psi | 80% | 2178 fps | 98.1% |
| IMR 3031 | <<locked>> | 80% | 38,566 psi | 82% | 2221 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,853 psi | 74% | 2110 fps | 96.4% |
| IMR 4831 | <<locked>> | 92% | 34,606 psi | 73% | 2182 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 35,650 psi | 76% | 2175 fps | 97.2% |
| Lovex D073.6 | <<locked>> | 80% | 37,362 psi | 79% | 2192 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 39,711 psi | 84% | 2162 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 34,389 psi | 73% | 2113 fps | 98.1% |
| Lovex S065 | <<locked>> | 90% | 38,508 psi | 82% | 2192 fps | 95% |
| Norma 201 | <<locked>> | 80% | 38,058 psi | 81% | 2169 fps | 98.8% |
| Norma 202 | <<locked>> | 80% | 38,290 psi | 81% | 2182 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 34,229 psi | 73% | 2139 fps | 96.7% |
| Norma URP | <<locked>> | 90% | 34,040 psi | 72% | 2175 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 33,663 psi | 71% | 2149 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,034 psi | 55% | 1312 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 36,027 psi | 76% | 2231 fps | 96.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,660 psi | 63% | 2113 fps | 97.7% |
| ReloadSwiss RS 62 | 66.5 gr | 92% | 35,549 psi | 75% | 2234 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 39,117 psi | 83% | 2297 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 36,172 psi | 77% | 2126 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 80% | 29,515 psi | 63% | 2044 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 38,508 psi | 82% | 2192 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,362 psi | 79% | 2192 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 34,389 psi | 73% | 2113 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 30,835 psi | 65% | 2090 fps | 95.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,725 psi | 82% | 2192 fps | 95.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,550 psi | 80% | 2182 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,885 psi | 85% | 2139 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,764 psi | 70% | 2024 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 39,291 psi | 83% | 2142 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,595 psi | 82% | 2195 fps | 97.8% |
| Somchem S355 | <<locked>> | 80% | 30,690 psi | 65% | 2054 fps | 96% |
| Somchem S365 | <<locked>> | 86% | 26,614 psi | 56% | 2034 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 35,331 psi | 75% | 2119 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,201 psi | 77% | 2129 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,095 psi | 62% | 2005 fps | 96.9% |
| Vihtavuori N160 | <<locked>> | 90% | 35,824 psi | 76% | 2182 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 34,722 psi | 74% | 2116 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 90% | 35,012 psi | 74% | 2182 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 98% | 32,561 psi | 69% | 2201 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 29,820 psi | 63% | 2028 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,709 psi | 78% | 2185 fps | 98% |
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 61 powders for .375 Fl. Mag. N.E. loaded with the .375 | 300gr | Barnes TSX FB. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,369 fps; across all powders the maximum-charge window runs from 1,437 fps to 2,369 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 61 of the 61 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.375" calls for a 1:16.0 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 62, Alliant Reloder-16, Accurate 4350 rank at the top here: for .375 Fl. Mag. N.E. with the .375 | 300gr | Barnes TSX FB 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.