Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .375 | 256gr | Sologne GPA bullet and 55 powders. The key underlying parameters are shown in the table above.
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 2015 | <<locked>> | 82% | 42,641 psi | 90% | 2395 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 42,235 psi | 90% | 2444 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 41,234 psi | 87% | 2441 fps | 99.4% |
| Accurate 4064 | <<locked>> | 90% | 42,264 psi | 90% | 2474 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 41,698 psi | 88% | 2444 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 90% | 42,583 psi | 90% | 2444 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 41,104 psi | 87% | 2408 fps | 98.1% |
| Alliant AR-Comp | <<locked>> | 82% | 39,958 psi | 85% | 2415 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 41,437 psi | 88% | 2461 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 88% | 42,105 psi | 89% | 2474 fps | 96.7% |
| Alliant Reloder-17 | <<locked>> | 94% | 41,336 psi | 88% | 2539 fps | 97.4% |
| Bofors RP3 | <<locked>> | 90% | 41,002 psi | 87% | 2467 fps | 98% |
| Hodgdon BL-C2 | <<locked>> | 84% | 41,843 psi | 89% | 2474 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 84% | 41,959 psi | 89% | 2457 fps | 97.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,842 psi | 85% | 2448 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 40,118 psi | 85% | 2470 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,432 psi | 73% | 1568 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 40,466 psi | 86% | 2411 fps | 97.3% |
| IMR 3031 | <<locked>> | 84% | 40,640 psi | 86% | 2457 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 42,061 psi | 89% | 2428 fps | 96.7% |
| IMR 4895 | <<locked>> | 86% | 40,480 psi | 86% | 2454 fps | 96.9% |
| IMR 8208 XBR | <<locked>> | 82% | 41,104 psi | 87% | 2408 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 86% | 42,627 psi | 90% | 2477 fps | 99.5% |
| Lovex S060 | <<locked>> | 84% | 42,424 psi | 90% | 2392 fps | 97.3% |
| Lovex S062 | <<locked>> | 88% | 41,481 psi | 88% | 2431 fps | 98.3% |
| Norma 201 | <<locked>> | 84% | 40,857 psi | 87% | 2405 fps | 98.1% |
| Norma 202 | <<locked>> | 84% | 40,872 psi | 87% | 2418 fps | 99.7% |
| Norma 203B | <<locked>> | 88% | 41,336 psi | 88% | 2464 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 88% | 41,147 psi | 87% | 2477 fps | 96.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 40,161 psi | 85% | 2425 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,751 psi | 74% | 1608 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 41,017 psi | 87% | 2516 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 41,350 psi | 88% | 2552 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 82% | 42,206 psi | 90% | 2408 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 86% | 41,205 psi | 87% | 2405 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 92% | 40,915 psi | 87% | 2457 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 86% | 42,627 psi | 90% | 2477 fps | 99.5% |
| Shooters World Precision | <<locked>> | 88% | 41,481 psi | 88% | 2431 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 42,627 psi | 90% | 2510 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 40,045 psi | 85% | 2415 fps | 96.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 40,118 psi | 85% | 2329 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 42,221 psi | 90% | 2375 fps | 100% |
| Somchem S335 | <<locked>> | 84% | 42,090 psi | 89% | 2379 fps | 99.9% |
| Somchem S341 | <<locked>> | 84% | 41,423 psi | 88% | 2428 fps | 96.9% |
| Somchem S355 | <<locked>> | 92% | 42,076 psi | 89% | 2464 fps | 97.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,798 psi | 82% | 2493 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 82% | 40,132 psi | 85% | 2333 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 42,554 psi | 90% | 2441 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 41,046 psi | 87% | 2402 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 92% | 40,248 psi | 85% | 2408 fps | 98.5% |
| Vihtavuori N530 | <<locked>> | 82% | 41,147 psi | 87% | 2408 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 88% | 42,148 psi | 89% | 2438 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 41,394 psi | 88% | 2438 fps | 97.4% |
| Winchester 748 | <<locked>> | 82% | 39,900 psi | 85% | 2441 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 86% | 41,974 psi | 89% | 2467 fps | 97.8% |
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 40,045 psi | 85% | 2349 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 32,401 psi | 69% | 2260 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 38,493 psi | 82% | 2388 fps | 99% |
| Accurate 4064 | <<locked>> | 80% | 30,690 psi | 65% | 2238 fps | 98.1% |
| ADI AR 2206H | <<locked>> | 80% | 36,695 psi | 78% | 2346 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 86% | 37,710 psi | 80% | 2349 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,696 psi | 82% | 2362 fps | 97.6% |
| Alliant AR-Comp | <<locked>> | 80% | 37,347 psi | 79% | 2372 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 32,184 psi | 68% | 2270 fps | 95.2% |
| Alliant Reloder-15 | <<locked>> | 84% | 37,217 psi | 79% | 2375 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 90% | 36,129 psi | 77% | 2425 fps | 95.6% |
| Bofors RP3 | <<locked>> | 82% | 31,444 psi | 67% | 2267 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,477 psi | 77% | 2369 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 80% | 36,927 psi | 78% | 2356 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 35,244 psi | 75% | 2352 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,996 psi | 70% | 2316 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,628 psi | 54% | 1401 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,621 psi | 76% | 2313 fps | 95.8% |
| IMR 3031 | <<locked>> | 80% | 35,766 psi | 76% | 2369 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 37,144 psi | 79% | 2333 fps | 95.2% |
| IMR 4895 | <<locked>> | 82% | 35,592 psi | 76% | 2352 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 38,696 psi | 82% | 2362 fps | 97.6% |
| Lovex D073.6 | <<locked>> | 80% | 34,737 psi | 74% | 2326 fps | 98.2% |
| Lovex S060 | <<locked>> | 80% | 37,565 psi | 80% | 2297 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 32,387 psi | 69% | 2244 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 35,926 psi | 76% | 2306 fps | 96.9% |
| Norma 202 | <<locked>> | 80% | 36,027 psi | 76% | 2326 fps | 99% |
| Norma 203B | <<locked>> | 84% | 36,506 psi | 77% | 2365 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 84% | 36,013 psi | 76% | 2372 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,449 psi | 79% | 2372 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,686 psi | 54% | 1434 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 38,290 psi | 81% | 2461 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 29,834 psi | 63% | 2274 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 39,682 psi | 84% | 2359 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 80% | 34,200 psi | 73% | 2264 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 86% | 33,576 psi | 71% | 2310 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,737 psi | 74% | 2326 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 32,387 psi | 69% | 2244 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 37,434 psi | 79% | 2408 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,288 psi | 75% | 2316 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,768 psi | 80% | 2283 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,922 psi | 66% | 2159 fps | 98.6% |
| Somchem S335 | <<locked>> | 80% | 37,115 psi | 79% | 2287 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 36,158 psi | 77% | 2326 fps | 95.3% |
| Somchem S355 | <<locked>> | 86% | 34,954 psi | 74% | 2323 fps | 95.7% |
| Somchem S365 | <<locked>> | 94% | 32,140 psi | 68% | 2339 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 37,855 psi | 80% | 2290 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,069 psi | 70% | 2264 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 34,011 psi | 72% | 2267 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 82% | 29,167 psi | 62% | 2172 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 38,464 psi | 82% | 2356 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 80% | 32,547 psi | 69% | 2251 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 36,521 psi | 77% | 2339 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 37,318 psi | 79% | 2392 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,272 psi | 73% | 2313 fps | 95.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 55 powders for .375 Fl. Mag. N.E. loaded with the .375 | 256gr | Sologne GPA. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,552 fps; across all powders the maximum-charge window runs from 1,568 fps to 2,552 fps. Hodgdon Hybrid 100V gives the best case fill at 100 %, and 55 of the 55 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 73–90 %, leaving at least 10 % headroom. The 256.0 gr projectile in 0.375" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Hodgdon Hybrid 100V, 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.