Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .375 | 300gr | Nosler AccuBond bullet and 53 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 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 2495 | <<locked>> | 84% | 41,234 psi | 87% | 2218 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 41,481 psi | 88% | 2254 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 42,163 psi | 89% | 2329 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 86% | 41,075 psi | 87% | 2224 fps | 97.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 41,162 psi | 87% | 2336 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 40,364 psi | 86% | 2244 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 84% | 40,886 psi | 87% | 2257 fps | 97.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 42,424 psi | 90% | 2343 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 42,540 psi | 90% | 2372 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,895 psi | 72% | 2201 fps | 96.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 41,655 psi | 88% | 2270 fps | 97.5% |
| Bofors RP3 | <<locked>> | 88% | 42,612 psi | 90% | 2293 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 86% | 41,031 psi | 87% | 2254 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 41,350 psi | 88% | 2287 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 41,249 psi | 88% | 2297 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,983 psi | 74% | 1437 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 41,408 psi | 88% | 2234 fps | 98.8% |
| IMR 3031 | <<locked>> | 82% | 42,308 psi | 90% | 2274 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 40,640 psi | 86% | 2211 fps | 97.9% |
| IMR 4831 | <<locked>> | 96% | 40,640 psi | 86% | 2290 fps | 97.3% |
| IMR 4895 | <<locked>> | 84% | 41,887 psi | 89% | 2283 fps | 98.6% |
| Lovex D073.6 | <<locked>> | 82% | 41,307 psi | 88% | 2251 fps | 99.9% |
| Lovex S062 | <<locked>> | 84% | 40,292 psi | 85% | 2215 fps | 99.2% |
| Lovex S065 | <<locked>> | 92% | 42,047 psi | 89% | 2247 fps | 96% |
| Norma 201 | <<locked>> | 82% | 41,930 psi | 89% | 2228 fps | 99.4% |
| Norma 202 | <<locked>> | 82% | 42,076 psi | 89% | 2238 fps | 100% |
| Norma 203B | <<locked>> | 84% | 40,205 psi | 85% | 2247 fps | 98.3% |
| Norma URP | <<locked>> | 96% | 42,453 psi | 90% | 2329 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 86% | 42,337 psi | 90% | 2306 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,462 psi | 75% | 1473 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 42,453 psi | 90% | 2343 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 42,409 psi | 90% | 2379 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 42,003 psi | 89% | 2349 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 84% | 42,337 psi | 90% | 2228 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 90% | 42,540 psi | 90% | 2287 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 42,047 psi | 89% | 2247 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 82% | 41,307 psi | 88% | 2251 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 40,292 psi | 85% | 2215 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 41,220 psi | 87% | 2290 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 41,075 psi | 87% | 2241 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 40,611 psi | 86% | 2156 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 42,453 psi | 90% | 2254 fps | 98.5% |
| Somchem S355 | <<locked>> | 88% | 40,886 psi | 87% | 2247 fps | 98.7% |
| Somchem S365 | <<locked>> | 98% | 40,248 psi | 85% | 2333 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 84% | 41,437 psi | 88% | 2211 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 42,235 psi | 90% | 2221 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 41,582 psi | 88% | 2234 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 94% | 41,989 psi | 89% | 2287 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 84% | 40,654 psi | 86% | 2215 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 41,104 psi | 87% | 2290 fps | 96.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,955 psi | 76% | 2264 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 42,467 psi | 90% | 2274 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 82% | 40,437 psi | 86% | 2244 fps | 98.7% |
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 2495 | <<locked>> | 80% | 36,172 psi | 77% | 2136 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 34,229 psi | 73% | 2126 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 34,389 psi | 73% | 2188 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 34,214 psi | 73% | 2093 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 36,100 psi | 77% | 2231 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,402 psi | 71% | 2113 fps | 97.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,955 psi | 76% | 2162 fps | 96.6% |
| Alliant Reloder-16 | 60.4 gr | 90% | 35,520 psi | 75% | 2201 fps | 95.6% |
| Alliant Reloder-17 | 59.2 gr | 82% | 30,632 psi | 65% | 2119 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,894 psi | 68% | 2152 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,914 psi | 83% | 2221 fps | 96.9% |
| Bofors RP3 | <<locked>> | 80% | 32,663 psi | 69% | 2110 fps | 97.3% |
| Hodgdon H380 | <<locked>> | 82% | 36,027 psi | 76% | 2159 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 30,385 psi | 64% | 2067 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,289 psi | 77% | 2205 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,092 psi | 55% | 1283 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,827 psi | 82% | 2192 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 39,668 psi | 84% | 2231 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,839 psi | 76% | 2123 fps | 96.6% |
| IMR 4831 | <<locked>> | 90% | 33,533 psi | 71% | 2152 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 36,767 psi | 78% | 2188 fps | 97.5% |
| Lovex D073.6 | <<locked>> | 80% | 38,638 psi | 82% | 2205 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 35,592 psi | 76% | 2126 fps | 98.3% |
| Lovex S065 | <<locked>> | 90% | 39,494 psi | 84% | 2201 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 39,305 psi | 83% | 2182 fps | 99% |
| Norma 202 | <<locked>> | 80% | 39,421 psi | 84% | 2195 fps | 100% |
| Norma 203B | <<locked>> | 80% | 35,317 psi | 75% | 2152 fps | 97% |
| Norma URP | <<locked>> | 90% | 35,128 psi | 75% | 2192 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 34,679 psi | 74% | 2162 fps | 96.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,252 psi | 56% | 1312 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 37,115 psi | 79% | 2244 fps | 97% |
| ReloadSwiss RS 60 | 57.8 gr | 80% | 30,647 psi | 65% | 2129 fps | 98.1% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 36,738 psi | 78% | 2251 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 37,391 psi | 79% | 2139 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 30,777 psi | 65% | 2064 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 39,494 psi | 84% | 2201 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,638 psi | 82% | 2205 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 35,592 psi | 76% | 2126 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,865 psi | 68% | 2103 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,595 psi | 82% | 2195 fps | 97.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,750 psi | 72% | 2037 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 39,653 psi | 84% | 2205 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 31,836 psi | 68% | 2070 fps | 96.4% |
| Somchem S365 | <<locked>> | 86% | 27,717 psi | 59% | 2054 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 80% | 36,506 psi | 77% | 2133 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,260 psi | 79% | 2139 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 30,211 psi | 64% | 2021 fps | 97.3% |
| Vihtavuori N160 | <<locked>> | 88% | 34,635 psi | 73% | 2149 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 35,810 psi | 76% | 2129 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 36,027 psi | 76% | 2195 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 96% | 31,705 psi | 67% | 2172 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,792 psi | 65% | 2044 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,753 psi | 80% | 2198 fps | 98.2% |
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 53 powders for .375 Fl. Mag. N.E. loaded with the .375 | 300gr | Nosler AccuBond. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,379 fps; across all powders the maximum-charge window runs from 1,437 fps to 2,379 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 53 of the 53 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 72–90 %, 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 60, Alliant Reloder-17, Alliant Reloder-16 rank at the top here: for .375 Fl. Mag. N.E. with the .375 | 300gr | Nosler AccuBond 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.