Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .375 | 250gr | Barnes X S bullet and 40 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 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 2495 | <<locked>> | 84% | 42,525 psi | 90% | 2454 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 42,293 psi | 90% | 2484 fps | 99.9% |
| Accurate 4350 | <<locked>> | 96% | 42,105 psi | 89% | 2546 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 86% | 41,060 psi | 87% | 2434 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 40,393 psi | 86% | 2457 fps | 97.6% |
| Alliant Reloder-15 | <<locked>> | 84% | 40,857 psi | 87% | 2467 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 92% | 42,235 psi | 90% | 2579 fps | 97.5% |
| Bofors RP3 | <<locked>> | 86% | 40,234 psi | 85% | 2467 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 41,278 psi | 88% | 2493 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 41,089 psi | 87% | 2510 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,273 psi | 75% | 1604 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 41,321 psi | 88% | 2448 fps | 97.4% |
| IMR 3031 | <<locked>> | 82% | 41,989 psi | 89% | 2500 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 40,553 psi | 86% | 2418 fps | 96.2% |
| IMR 4895 | <<locked>> | 84% | 41,771 psi | 89% | 2497 fps | 97.1% |
| Lovex D073.6 | <<locked>> | 82% | 41,553 psi | 88% | 2470 fps | 99.4% |
| Lovex S062 | <<locked>> | 84% | 40,741 psi | 86% | 2431 fps | 98.1% |
| Norma 201 | <<locked>> | 82% | 42,308 psi | 90% | 2448 fps | 98.4% |
| Norma 202 | <<locked>> | 82% | 42,134 psi | 89% | 2457 fps | 99.7% |
| Norma 203B | <<locked>> | 84% | 40,234 psi | 85% | 2457 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 86% | 42,105 psi | 89% | 2516 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,737 psi | 76% | 1644 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 42,206 psi | 90% | 2559 fps | 96.6% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 42,322 psi | 90% | 2592 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 82% | 40,509 psi | 86% | 2405 fps | 98% |
| Rottweil R 903 | <<locked>> | 88% | 40,277 psi | 85% | 2461 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 41,553 psi | 88% | 2470 fps | 99.4% |
| Shooters World Precision | <<locked>> | 84% | 40,741 psi | 86% | 2431 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 40,959 psi | 87% | 2500 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 41,031 psi | 87% | 2451 fps | 96.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 40,640 psi | 86% | 2369 fps | 99.9% |
| Somchem S341 | <<locked>> | 82% | 42,235 psi | 90% | 2464 fps | 97% |
| Somchem S355 | <<locked>> | 88% | 41,133 psi | 87% | 2464 fps | 97.4% |
| Somchem S365 | <<locked>> | 98% | 40,248 psi | 85% | 2543 fps | 98.4% |
| Vihtavuori N135 | <<locked>> | 84% | 41,611 psi | 88% | 2438 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 42,293 psi | 90% | 2441 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 90% | 41,669 psi | 88% | 2451 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 84% | 40,814 psi | 87% | 2431 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 42,322 psi | 90% | 2477 fps | 97.5% |
| Winchester StaBALL Match | <<locked>> | 82% | 40,408 psi | 86% | 2457 fps | 97.3% |
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 2495 | <<locked>> | 80% | 37,768 psi | 80% | 2369 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 35,592 psi | 76% | 2352 fps | 99.1% |
| Accurate 4350 | <<locked>> | 94% | 39,639 psi | 84% | 2497 fps | 95% |
| ADI AR 2208 | <<locked>> | 84% | 38,653 psi | 82% | 2385 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,750 psi | 72% | 2316 fps | 95.6% |
| Alliant Reloder-15 | <<locked>> | 82% | 38,624 psi | 82% | 2421 fps | 95.5% |
| Alliant Reloder-17 | 66.8 gr | 86% | 35,157 psi | 75% | 2418 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 33,431 psi | 71% | 2320 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 34,737 psi | 74% | 2356 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,303 psi | 77% | 2408 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,397 psi | 56% | 1434 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,899 psi | 83% | 2398 fps | 96.8% |
| IMR 3031 | <<locked>> | 80% | 39,523 psi | 84% | 2454 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 38,305 psi | 81% | 2372 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 37,130 psi | 79% | 2398 fps | 95.8% |
| Lovex D073.6 | <<locked>> | 80% | 39,059 psi | 83% | 2425 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 36,260 psi | 77% | 2339 fps | 96.9% |
| Norma 201 | <<locked>> | 80% | 40,059 psi | 85% | 2402 fps | 97.9% |
| Norma 202 | <<locked>> | 80% | 39,682 psi | 84% | 2411 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 35,795 psi | 76% | 2362 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 82% | 37,130 psi | 79% | 2411 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,745 psi | 57% | 1470 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 39,508 psi | 84% | 2503 fps | 95.8% |
| ReloadSwiss RS 60 | 62.2 gr | 80% | 31,227 psi | 66% | 2323 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 38,319 psi | 81% | 2359 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 82% | 33,620 psi | 71% | 2316 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,059 psi | 83% | 2425 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 36,260 psi | 77% | 2339 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 36,448 psi | 77% | 2402 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,682 psi | 82% | 2402 fps | 96.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,142 psi | 72% | 2241 fps | 99.2% |
| Somchem S341 | <<locked>> | 80% | 39,668 psi | 84% | 2415 fps | 96.3% |
| Somchem S355 | <<locked>> | 82% | 34,519 psi | 73% | 2323 fps | 95.4% |
| Somchem S365 | 66.3 gr | 90% | 31,952 psi | 68% | 2346 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 36,956 psi | 78% | 2352 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,434 psi | 79% | 2349 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 80% | 30,806 psi | 65% | 2218 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 36,260 psi | 77% | 2343 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 35,302 psi | 75% | 2329 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,855 psi | 80% | 2405 fps | 96.6% |
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 40 powders for .375 Fl. Mag. N.E. loaded with the .375 | 250gr | Barnes X S. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,592 fps; across all powders the maximum-charge window runs from 1,604 fps to 2,592 fps. Hodgdon TrailBoss 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 75–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. 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, Somchem S365 rank at the top here: for .375 Fl. Mag. N.E. with the .375 | 250gr | Barnes X S 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.