Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .375 | 300gr | Hornady DGS bullet and 40 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-16 and Somchem S365.
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 4064 | <<locked>> | 82% | 40,712 psi | 86% | 2267 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 41,771 psi | 89% | 2359 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 84% | 42,322 psi | 90% | 2283 fps | 98.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 42,569 psi | 90% | 2405 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 41,872 psi | 89% | 2303 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,192 psi | 90% | 2313 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 92% | 41,466 psi | 88% | 2365 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 88% | 41,466 psi | 88% | 2392 fps | 99.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,855 psi | 80% | 2326 fps | 98.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,858 psi | 89% | 2464 fps | 97.8% |
| Bofors RP3 | <<locked>> | 84% | 41,568 psi | 88% | 2310 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 84% | 42,496 psi | 90% | 2316 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 40,654 psi | 86% | 2313 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,447 psi | 75% | 1483 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 41,756 psi | 89% | 2267 fps | 98.7% |
| IMR 4831 | <<locked>> | 92% | 40,277 psi | 85% | 2316 fps | 97.8% |
| Lovex S062 | <<locked>> | 82% | 41,582 psi | 88% | 2270 fps | 99.7% |
| Lovex S065 | <<locked>> | 88% | 40,959 psi | 87% | 2264 fps | 96.5% |
| Norma 203B | <<locked>> | 82% | 41,539 psi | 88% | 2303 fps | 99% |
| Norma URP | <<locked>> | 92% | 41,858 psi | 89% | 2356 fps | 98% |
| Ramshot Big Game | <<locked>> | 82% | 41,147 psi | 87% | 2320 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 92% | 40,857 psi | 87% | 2343 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,926 psi | 76% | 1519 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 41,321 psi | 88% | 2395 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 41,495 psi | 88% | 2379 fps | 97.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 41,626 psi | 88% | 2388 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 86% | 41,800 psi | 89% | 2310 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 40,959 psi | 87% | 2264 fps | 96.5% |
| Shooters World Precision | <<locked>> | 82% | 41,582 psi | 88% | 2270 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 40,118 psi | 85% | 2306 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 41,858 psi | 89% | 2205 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 42,453 psi | 90% | 2306 fps | 99.4% |
| Somchem S365 | <<locked>> | 96% | 42,583 psi | 90% | 2408 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 40,669 psi | 86% | 2254 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 90% | 41,075 psi | 87% | 2306 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 82% | 42,047 psi | 89% | 2267 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 40,350 psi | 86% | 2310 fps | 97.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,973 psi | 87% | 2392 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 41,046 psi | 87% | 2290 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,736 psi | 72% | 2323 fps | 98.4% |
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 4064 | <<locked>> | 80% | 38,189 psi | 81% | 2224 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 31,763 psi | 67% | 2159 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 37,333 psi | 79% | 2192 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,813 psi | 84% | 2352 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,927 psi | 78% | 2215 fps | 98.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,639 psi | 84% | 2267 fps | 98.2% |
| Alliant Reloder-16 | 62.2 gr | 84% | 32,590 psi | 69% | 2175 fps | 95.3% |
| Alliant Reloder-17 | 63.8 gr | 80% | 31,821 psi | 68% | 2185 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 29,689 psi | 63% | 2136 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 36,405 psi | 77% | 2349 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 36,521 psi | 77% | 2218 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 80% | 37,289 psi | 79% | 2218 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,021 psi | 59% | 2041 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,426 psi | 56% | 1322 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,204 psi | 83% | 2221 fps | 98.2% |
| IMR 4831 | <<locked>> | 86% | 33,025 psi | 70% | 2172 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 39,204 psi | 83% | 2228 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 36,390 psi | 77% | 2178 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 39,001 psi | 83% | 2257 fps | 98.5% |
| Norma URP | <<locked>> | 84% | 32,489 psi | 69% | 2169 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 38,493 psi | 82% | 2270 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 38,290 psi | 81% | 2293 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,789 psi | 57% | 1355 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,881 psi | 72% | 2244 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 33,852 psi | 72% | 2224 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 36,579 psi | 78% | 2283 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 34,287 psi | 73% | 2165 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,390 psi | 77% | 2178 fps | 95.1% |
| Shooters World Precision | <<locked>> | 80% | 39,204 psi | 83% | 2228 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,273 psi | 75% | 2211 fps | 97.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,927 psi | 78% | 2126 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,273 psi | 75% | 2175 fps | 98.1% |
| Somchem S365 | 60.5 gr | 80% | 25,599 psi | 54% | 2028 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 33,417 psi | 71% | 2119 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 33,794 psi | 72% | 2165 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 39,378 psi | 84% | 2224 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,185 psi | 70% | 2169 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 90% | 29,849 psi | 63% | 2159 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,646 psi | 63% | 2054 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,646 psi | 63% | 2205 fps | 96.2% |
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 40 powders for .375 Fl. Mag. N.E. loaded with the .375 | 300gr | Hornady DGS. Alliant Reloder-26 delivers the highest muzzle velocity at 2,464 fps; across all powders the maximum-charge window runs from 1,483 fps to 2,464 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 40 of the 40 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 1:6.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, 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-17, Alliant Reloder-16, Somchem S365 rank at the top here: for .375 Fl. Mag. N.E. with the .375 | 300gr | Hornady DGS 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.