Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .375 | 250gr | NorthFork Bonded Core bullet and 51 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 Bofors RP3.
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>> | 86% | 41,959 psi | 89% | 2487 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 42,090 psi | 89% | 2520 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 40,930 psi | 87% | 2484 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 88% | 42,047 psi | 89% | 2490 fps | 96.7% |
| Alliant AR-Comp | <<locked>> | 82% | 42,351 psi | 90% | 2503 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 42,308 psi | 90% | 2605 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 41,031 psi | 87% | 2507 fps | 98.1% |
| Alliant Reloder-15 | <<locked>> | 86% | 41,655 psi | 88% | 2520 fps | 96.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 40,799 psi | 87% | 2585 fps | 97.5% |
| Bofors RP3 | <<locked>> | 88% | 40,654 psi | 86% | 2513 fps | 98.1% |
| Hodgdon BL-C2 | <<locked>> | 82% | 41,220 psi | 87% | 2513 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 82% | 41,278 psi | 88% | 2497 fps | 97.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,206 psi | 90% | 2549 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 42,322 psi | 90% | 2569 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,635 psi | 73% | 1621 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 42,453 psi | 90% | 2503 fps | 97.9% |
| IMR 3031 | <<locked>> | 82% | 40,277 psi | 85% | 2503 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 41,495 psi | 88% | 2474 fps | 96.8% |
| IMR 4831 | <<locked>> | 98% | 41,394 psi | 88% | 2549 fps | 96% |
| IMR 4895 | <<locked>> | 86% | 42,656 psi | 90% | 2549 fps | 97.6% |
| Lovex D073.6 | <<locked>> | 84% | 42,119 psi | 89% | 2520 fps | 99.6% |
| Lovex S060 | <<locked>> | 82% | 41,655 psi | 88% | 2434 fps | 97.3% |
| Lovex S062 | <<locked>> | 86% | 41,075 psi | 87% | 2477 fps | 98.4% |
| Norma 201 | <<locked>> | 82% | 40,248 psi | 85% | 2448 fps | 98.2% |
| Norma 202 | <<locked>> | 82% | 40,263 psi | 85% | 2461 fps | 99.7% |
| Norma 203B | <<locked>> | 86% | 40,973 psi | 87% | 2510 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 86% | 40,524 psi | 86% | 2520 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 42,119 psi | 89% | 2516 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,954 psi | 74% | 1657 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 40,625 psi | 86% | 2562 fps | 96.5% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 40,785 psi | 87% | 2598 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 84% | 40,582 psi | 86% | 2448 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 90% | 40,582 psi | 86% | 2503 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 84% | 42,119 psi | 89% | 2520 fps | 99.6% |
| Shooters World Precision | <<locked>> | 86% | 41,075 psi | 87% | 2477 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 42,018 psi | 89% | 2556 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 42,148 psi | 89% | 2507 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 41,945 psi | 89% | 2415 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 41,582 psi | 88% | 2418 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 41,452 psi | 88% | 2418 fps | 99.9% |
| Somchem S341 | <<locked>> | 82% | 40,611 psi | 86% | 2467 fps | 96.9% |
| Somchem S355 | <<locked>> | 90% | 41,713 psi | 88% | 2510 fps | 97.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,147 psi | 87% | 2598 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 42,032 psi | 89% | 2415 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 42,177 psi | 89% | 2484 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 40,640 psi | 86% | 2448 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 92% | 42,569 psi | 90% | 2500 fps | 99% |
| Vihtavuori N540 | <<locked>> | 86% | 41,553 psi | 88% | 2480 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 40,944 psi | 87% | 2484 fps | 97.6% |
| Winchester 748 | <<locked>> | 82% | 42,134 psi | 89% | 2536 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 84% | 41,379 psi | 88% | 2510 fps | 97.8% |
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% | 34,360 psi | 73% | 2346 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 32,474 psi | 69% | 2326 fps | 98.7% |
| ADI AR 2206H | <<locked>> | 80% | 38,508 psi | 82% | 2434 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 37,202 psi | 79% | 2392 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 39,581 psi | 84% | 2457 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 39,639 psi | 84% | 2549 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,850 psi | 68% | 2310 fps | 95.2% |
| Alliant Reloder-15 | <<locked>> | 82% | 36,637 psi | 78% | 2415 fps | 95.2% |
| Alliant Reloder-17 | 71.1 gr | 88% | 35,839 psi | 76% | 2470 fps | 95.8% |
| Bofors RP3 | 62.3 gr | 80% | 31,183 psi | 66% | 2306 fps | 95.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,566 psi | 82% | 2464 fps | 98.3% |
| Hodgdon H4895 | <<locked>> | 80% | 38,783 psi | 82% | 2448 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 35,012 psi | 74% | 2398 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,635 psi | 73% | 2405 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,860 psi | 55% | 1447 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,333 psi | 79% | 2402 fps | 96.6% |
| IMR 3031 | <<locked>> | 80% | 37,681 psi | 80% | 2454 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 36,637 psi | 78% | 2375 fps | 95.3% |
| IMR 4831 | <<locked>> | 96% | 38,682 psi | 82% | 2493 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 35,215 psi | 75% | 2395 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 80% | 36,912 psi | 78% | 2418 fps | 98.8% |
| Lovex S060 | <<locked>> | 80% | 39,204 psi | 83% | 2385 fps | 96.7% |
| Lovex S062 | <<locked>> | 80% | 34,069 psi | 72% | 2329 fps | 96.5% |
| Norma 201 | <<locked>> | 80% | 37,666 psi | 80% | 2395 fps | 97.6% |
| Norma 202 | <<locked>> | 80% | 37,782 psi | 80% | 2411 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 35,998 psi | 76% | 2405 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 82% | 35,462 psi | 75% | 2411 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,407 psi | 84% | 2464 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,078 psi | 55% | 1483 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 37,927 psi | 80% | 2507 fps | 95.6% |
| ReloadSwiss RS 60 | 64.6 gr | 80% | 29,399 psi | 62% | 2313 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 35,984 psi | 76% | 2352 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 84% | 33,446 psi | 71% | 2352 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,912 psi | 78% | 2418 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 34,069 psi | 72% | 2329 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 37,072 psi | 79% | 2454 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,043 psi | 79% | 2405 fps | 95.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,334 psi | 83% | 2369 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,300 psi | 69% | 2238 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 38,812 psi | 82% | 2372 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 38,058 psi | 81% | 2418 fps | 96.2% |
| Somchem S355 | <<locked>> | 84% | 34,577 psi | 73% | 2362 fps | 95.8% |
| Somchem S365 | <<locked>> | 90% | 29,979 psi | 64% | 2333 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 39,465 psi | 84% | 2372 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,795 psi | 74% | 2349 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,665 psi | 76% | 2349 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 80% | 28,805 psi | 61% | 2208 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 34,272 psi | 73% | 2336 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 33,663 psi | 71% | 2326 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 39,407 psi | 84% | 2487 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,100 psi | 77% | 2402 fps | 96.4% |
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 51 powders for .375 Fl. Mag. N.E. loaded with the .375 | 250gr | NorthFork Bonded Core. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,605 fps; across all powders the maximum-charge window runs from 1,621 fps to 2,605 fps. Hodgdon Hybrid 100V gives the best case fill at 100 %, and 51 of the 51 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 250.0 gr projectile in 0.375" calls for a 1:6.0 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. ReloadSwiss RS 60, Alliant Reloder-17, Bofors RP3 rank at the top here: for .375 Fl. Mag. N.E. with the .375 | 250gr | NorthFork Bonded Core 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.