Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .375 | 250gr | Hornady CX bullet and 57 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>> | 84% | 40,437 psi | 86% | 2372 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 41,104 psi | 87% | 2415 fps | 99.2% |
| Accurate 2495 | <<locked>> | 92% | 41,539 psi | 88% | 2454 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 41,611 psi | 88% | 2461 fps | 99.1% |
| Accurate 4064 | <<locked>> | 94% | 41,568 psi | 88% | 2480 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 88% | 42,192 psi | 90% | 2464 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 86% | 42,061 psi | 89% | 2434 fps | 97.7% |
| Alliant AR-Comp | <<locked>> | 86% | 40,205 psi | 85% | 2441 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 42,395 psi | 90% | 2513 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 41,539 psi | 88% | 2474 fps | 97.4% |
| Alliant Reloder-15 | <<locked>> | 92% | 42,511 psi | 90% | 2490 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 98% | 41,872 psi | 89% | 2546 fps | 96.6% |
| Bofors RP3 | <<locked>> | 94% | 41,002 psi | 87% | 2480 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 41,930 psi | 89% | 2392 fps | 98.2% |
| Hodgdon BL-C2 | <<locked>> | 88% | 42,424 psi | 90% | 2497 fps | 98.4% |
| Hodgdon H322 | <<locked>> | 82% | 42,134 psi | 89% | 2448 fps | 99.8% |
| Hodgdon H4895 | <<locked>> | 88% | 42,438 psi | 90% | 2474 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 40,654 psi | 86% | 2490 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,649 psi | 71% | 1552 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 41,147 psi | 87% | 2431 fps | 96.7% |
| IMR 3031 | <<locked>> | 88% | 40,828 psi | 87% | 2480 fps | 100% |
| IMR 4895 | <<locked>> | 90% | 40,828 psi | 87% | 2470 fps | 96.3% |
| IMR 8208 XBR | <<locked>> | 86% | 42,061 psi | 89% | 2434 fps | 97.7% |
| Lovex D073.5 | <<locked>> | 82% | 40,770 psi | 86% | 2411 fps | 98.3% |
| Lovex D073.6 | <<locked>> | 88% | 39,900 psi | 85% | 2441 fps | 98.8% |
| Lovex S060 | <<locked>> | 86% | 40,901 psi | 87% | 2369 fps | 96.1% |
| Lovex S062 | <<locked>> | 92% | 41,698 psi | 88% | 2444 fps | 97.8% |
| Norma 201 | <<locked>> | 88% | 41,046 psi | 87% | 2418 fps | 97.6% |
| Norma 202 | <<locked>> | 88% | 41,321 psi | 88% | 2441 fps | 99.4% |
| Norma 203B | <<locked>> | 92% | 41,640 psi | 88% | 2477 fps | 96.4% |
| Ramshot Big Game | <<locked>> | 92% | 41,814 psi | 89% | 2493 fps | 96% |
| Ramshot Wild Boar | <<locked>> | 86% | 40,944 psi | 87% | 2448 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,866 psi | 72% | 1591 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 41,771 psi | 89% | 2428 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 41,959 psi | 89% | 2562 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 86% | 42,351 psi | 90% | 2425 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 90% | 41,452 psi | 88% | 2418 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 96% | 40,683 psi | 86% | 2464 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 88% | 39,900 psi | 85% | 2441 fps | 98.8% |
| Shooters World Precision | <<locked>> | 92% | 41,698 psi | 88% | 2444 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 40,814 psi | 87% | 2434 fps | 96% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 40,944 psi | 87% | 2352 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 40,277 psi | 85% | 2356 fps | 99.7% |
| Somchem S321 | <<locked>> | 84% | 42,047 psi | 89% | 2457 fps | 98% |
| Somchem S335 | <<locked>> | 88% | 42,540 psi | 90% | 2395 fps | 99.8% |
| Somchem S341 | <<locked>> | 88% | 42,076 psi | 89% | 2448 fps | 96.3% |
| Somchem S355 | <<locked>> | 96% | 42,061 psi | 89% | 2474 fps | 97% |
| Vihtavuori N130 | <<locked>> | 82% | 41,205 psi | 87% | 2346 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 40,843 psi | 87% | 2356 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 40,045 psi | 85% | 2415 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 41,553 psi | 88% | 2421 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 96% | 40,364 psi | 86% | 2418 fps | 97.9% |
| Vihtavuori N530 | <<locked>> | 86% | 41,974 psi | 89% | 2428 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 90% | 40,016 psi | 85% | 2411 fps | 99.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 42,511 psi | 90% | 2454 fps | 96.7% |
| Winchester 748 | <<locked>> | 86% | 40,495 psi | 86% | 2464 fps | 98.3% |
| Winchester StaBALL Match | <<locked>> | 90% | 42,612 psi | 90% | 2487 fps | 97.2% |
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 35,520 psi | 75% | 2283 fps | 99.8% |
| Accurate 2460 | <<locked>> | 80% | 38,232 psi | 81% | 2362 fps | 98.7% |
| Accurate 2495 | <<locked>> | 80% | 27,630 psi | 59% | 2172 fps | 98.7% |
| Accurate 2520 | <<locked>> | 80% | 33,765 psi | 72% | 2310 fps | 97.3% |
| Accurate 4064 | <<locked>> | 80% | 26,208 psi | 56% | 2149 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 86% | 39,653 psi | 84% | 2415 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 34,592 psi | 73% | 2287 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 32,866 psi | 70% | 2306 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 39,523 psi | 84% | 2457 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 34,301 psi | 73% | 2333 fps | 95.2% |
| Alliant Reloder-15 | <<locked>> | 90% | 39,914 psi | 85% | 2441 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 96% | 39,189 psi | 83% | 2490 fps | 95.6% |
| Bofors RP3 | <<locked>> | 90% | 35,592 psi | 76% | 2372 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,941 psi | 78% | 2297 fps | 97% |
| Hodgdon BL-C2 | <<locked>> | 80% | 32,184 psi | 68% | 2290 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 80% | 39,479 psi | 84% | 2402 fps | 99.6% |
| Hodgdon H4895 | <<locked>> | 84% | 37,304 psi | 79% | 2375 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 35,650 psi | 76% | 2385 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,918 psi | 53% | 1388 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 36,332 psi | 77% | 2336 fps | 95.2% |
| IMR 3031 | <<locked>> | 80% | 31,285 psi | 66% | 2287 fps | 98.9% |
| IMR 4895 | <<locked>> | 88% | 38,159 psi | 81% | 2418 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 34,592 psi | 73% | 2287 fps | 95.6% |
| Lovex D073.5 | <<locked>> | 80% | 38,087 psi | 81% | 2362 fps | 97.7% |
| Lovex D073.6 | <<locked>> | 80% | 30,240 psi | 64% | 2241 fps | 96.1% |
| Lovex S060 | <<locked>> | 84% | 38,537 psi | 82% | 2323 fps | 95.4% |
| Lovex S062 | <<locked>> | 86% | 34,563 psi | 73% | 2303 fps | 95.8% |
| Norma 201 | <<locked>> | 82% | 33,997 psi | 72% | 2277 fps | 95.5% |
| Norma 202 | <<locked>> | 80% | 31,879 psi | 68% | 2251 fps | 97.4% |
| Norma 203B | <<locked>> | 90% | 39,131 psi | 83% | 2431 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 90% | 38,986 psi | 83% | 2438 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 38,159 psi | 81% | 2395 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,860 psi | 53% | 1417 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 39,030 psi | 83% | 2375 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 32,184 psi | 68% | 2339 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 35,157 psi | 75% | 2287 fps | 98% |
| Rottweil R 902 | <<locked>> | 84% | 34,345 psi | 73% | 2277 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 92% | 35,694 psi | 76% | 2369 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 30,240 psi | 64% | 2241 fps | 96.1% |
| Shooters World Precision | <<locked>> | 86% | 34,563 psi | 73% | 2303 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 38,232 psi | 81% | 2385 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,895 psi | 72% | 2218 fps | 97.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,398 psi | 58% | 2087 fps | 96.8% |
| Somchem S321 | <<locked>> | 80% | 36,651 psi | 78% | 2352 fps | 96.6% |
| Somchem S335 | <<locked>> | 80% | 33,257 psi | 71% | 2221 fps | 98.5% |
| Somchem S341 | <<locked>> | 86% | 39,378 psi | 84% | 2398 fps | 95.5% |
| Somchem S355 | <<locked>> | 92% | 37,086 psi | 79% | 2379 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 38,696 psi | 82% | 2303 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 33,881 psi | 72% | 2228 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 80% | 28,776 psi | 61% | 2188 fps | 98.9% |
| Vihtavuori N140 | <<locked>> | 80% | 30,095 psi | 64% | 2192 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 88% | 31,082 psi | 66% | 2231 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 34,301 psi | 73% | 2280 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 28,747 psi | 61% | 2172 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 37,260 psi | 79% | 2349 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 33,083 psi | 70% | 2310 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 86% | 37,086 psi | 79% | 2382 fps | 95.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 57 powders for .375 Fl. Mag. N.E. loaded with the .375 | 250gr | Hornady CX. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,562 fps; across all powders the maximum-charge window runs from 1,552 fps to 2,562 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 57 of the 57 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 71–90 %, 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, Winchester 6.5 StaBALL 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.