Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .374 | 270gr | Rhino Penetrator bullet and 59 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% | 41,901 psi | 89% | 2372 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 41,945 psi | 89% | 2405 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 39,900 psi | 85% | 2428 fps | 96% |
| ADI AR 2206H | <<locked>> | 82% | 40,886 psi | 87% | 2369 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 88% | 41,930 psi | 89% | 2375 fps | 97.1% |
| Alliant AR-Comp | <<locked>> | 82% | 42,293 psi | 90% | 2382 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 42,308 psi | 90% | 2490 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 41,002 psi | 87% | 2392 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 86% | 41,568 psi | 88% | 2405 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 96% | 40,640 psi | 86% | 2438 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 92% | 40,654 psi | 86% | 2470 fps | 97.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 42,627 psi | 90% | 2421 fps | 96.9% |
| Bofors RP3 | <<locked>> | 88% | 40,466 psi | 86% | 2398 fps | 98.4% |
| Hodgdon BL-C2 | <<locked>> | 82% | 41,249 psi | 88% | 2402 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 88% | 41,829 psi | 89% | 2402 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 82% | 41,220 psi | 87% | 2382 fps | 98.1% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,134 psi | 89% | 2434 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 42,221 psi | 90% | 2451 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,751 psi | 74% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 42,366 psi | 90% | 2388 fps | 98.3% |
| IMR 3031 | <<locked>> | 82% | 40,176 psi | 85% | 2382 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 41,423 psi | 88% | 2359 fps | 97.2% |
| IMR 4831 | <<locked>> | 98% | 41,162 psi | 87% | 2431 fps | 96.4% |
| IMR 4895 | <<locked>> | 86% | 42,569 psi | 90% | 2434 fps | 98% |
| Lovex D073.6 | <<locked>> | 84% | 42,061 psi | 89% | 2402 fps | 99.7% |
| Lovex S060 | <<locked>> | 82% | 41,597 psi | 88% | 2320 fps | 97.7% |
| Lovex S062 | <<locked>> | 86% | 40,959 psi | 87% | 2362 fps | 98.7% |
| Norma 201 | <<locked>> | 84% | 42,598 psi | 90% | 2375 fps | 98.9% |
| Norma 202 | <<locked>> | 82% | 40,292 psi | 85% | 2346 fps | 99.8% |
| Norma 203B | <<locked>> | 86% | 40,872 psi | 87% | 2395 fps | 97.6% |
| Norma URP | <<locked>> | 96% | 40,567 psi | 86% | 2431 fps | 96% |
| Ramshot Big Game | <<locked>> | 86% | 40,509 psi | 86% | 2408 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 42,134 psi | 89% | 2402 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,128 psi | 75% | 1572 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 40,408 psi | 86% | 2444 fps | 96.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 40,683 psi | 86% | 2480 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 42,627 psi | 90% | 2497 fps | 96.3% |
| Rottweil R 902 | <<locked>> | 84% | 40,582 psi | 86% | 2333 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 90% | 40,582 psi | 86% | 2392 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 42,061 psi | 89% | 2402 fps | 99.7% |
| Shooters World Precision | <<locked>> | 86% | 40,959 psi | 87% | 2362 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 41,959 psi | 89% | 2441 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 41,989 psi | 89% | 2392 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 41,858 psi | 89% | 2300 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 41,437 psi | 88% | 2303 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 41,263 psi | 88% | 2303 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 40,538 psi | 86% | 2356 fps | 97.3% |
| Somchem S355 | <<locked>> | 90% | 41,611 psi | 88% | 2395 fps | 98.2% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,886 psi | 87% | 2477 fps | 99.2% |
| Vihtavuori N133 | <<locked>> | 82% | 41,989 psi | 89% | 2300 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 42,018 psi | 89% | 2365 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 40,524 psi | 86% | 2329 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 92% | 42,351 psi | 90% | 2385 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 96% | 42,612 psi | 90% | 2431 fps | 96.4% |
| Vihtavuori N540 | <<locked>> | 86% | 41,597 psi | 88% | 2365 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 96% | 41,640 psi | 88% | 2434 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 40,683 psi | 86% | 2372 fps | 97.9% |
| Winchester 748 | <<locked>> | 82% | 42,032 psi | 89% | 2418 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 84% | 41,321 psi | 88% | 2395 fps | 98.2% |
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% | 34,345 psi | 73% | 2238 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 32,489 psi | 69% | 2221 fps | 99% |
| Accurate 4350 | <<locked>> | 94% | 37,304 psi | 79% | 2379 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 38,479 psi | 82% | 2323 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 84% | 37,115 psi | 79% | 2280 fps | 95.7% |
| Alliant AR-Comp | <<locked>> | 80% | 39,494 psi | 84% | 2339 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 36,999 psi | 78% | 2379 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,734 psi | 67% | 2201 fps | 95.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,418 psi | 73% | 2260 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 94% | 38,319 psi | 81% | 2388 fps | 95.3% |
| Alliant Reloder-17 | 65 gr | 86% | 33,373 psi | 71% | 2306 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,318 psi | 79% | 2320 fps | 95.3% |
| Bofors RP3 | 58.3 gr | 80% | 31,038 psi | 66% | 2201 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,435 psi | 82% | 2349 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 86% | 39,320 psi | 83% | 2352 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 38,754 psi | 82% | 2336 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 32,880 psi | 70% | 2244 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,693 psi | 74% | 2300 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,744 psi | 55% | 1365 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,275 psi | 79% | 2293 fps | 97.1% |
| IMR 3031 | <<locked>> | 80% | 37,637 psi | 80% | 2339 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,345 psi | 73% | 2218 fps | 95% |
| IMR 4831 | <<locked>> | 96% | 38,624 psi | 82% | 2385 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 35,186 psi | 75% | 2287 fps | 96% |
| Lovex D073.6 | <<locked>> | 80% | 36,724 psi | 78% | 2306 fps | 99.1% |
| Lovex S060 | <<locked>> | 80% | 39,160 psi | 83% | 2274 fps | 97.1% |
| Lovex S062 | <<locked>> | 80% | 34,026 psi | 72% | 2224 fps | 97% |
| Norma 201 | <<locked>> | 80% | 37,681 psi | 80% | 2283 fps | 98% |
| Norma 202 | <<locked>> | 80% | 37,666 psi | 80% | 2297 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 33,794 psi | 72% | 2247 fps | 95.4% |
| Norma URP | <<locked>> | 94% | 37,971 psi | 81% | 2379 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 82% | 35,462 psi | 75% | 2303 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,320 psi | 83% | 2352 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,020 psi | 55% | 1401 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 35,389 psi | 75% | 2339 fps | 95.3% |
| ReloadSwiss RS 60 | 60.5 gr | 80% | 29,341 psi | 62% | 2211 fps | 96.2% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 39,900 psi | 85% | 2444 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 35,897 psi | 76% | 2241 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 31,285 psi | 66% | 2198 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,724 psi | 78% | 2306 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 34,026 psi | 72% | 2224 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 34,606 psi | 73% | 2290 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,028 psi | 79% | 2297 fps | 96.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,291 psi | 83% | 2254 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,285 psi | 68% | 2133 fps | 99.3% |
| Somchem S335 | <<locked>> | 80% | 38,827 psi | 82% | 2260 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 38,000 psi | 81% | 2306 fps | 96.7% |
| Somchem S355 | <<locked>> | 82% | 32,314 psi | 69% | 2208 fps | 95.5% |
| Somchem S365 | <<locked>> | 90% | 29,892 psi | 63% | 2231 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 39,421 psi | 84% | 2257 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,737 psi | 74% | 2238 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,752 psi | 76% | 2244 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 28,848 psi | 61% | 2110 fps | 95.7% |
| Vihtavuori N160 | <<locked>> | 94% | 40,074 psi | 85% | 2385 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 34,214 psi | 73% | 2228 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 94% | 39,160 psi | 83% | 2385 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 33,562 psi | 71% | 2224 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 39,320 psi | 83% | 2369 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,071 psi | 77% | 2293 fps | 96.9% |
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 59 powders for .375 Fl. Mag. N.E. loaded with the .374 | 270gr | Rhino Penetrator. ReloadSwiss RS 62 delivers the highest muzzle velocity at 2,497 fps; across all powders the maximum-charge window runs from 1,532 fps to 2,497 fps. Hodgdon Hybrid 100V gives the best case fill at 100 %, and 59 of the 59 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 74–90 %, leaving at least 10 % headroom. The 270.0 gr projectile in 0.374" calls for a 1:17.0 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 .374 | 270gr | Rhino Penetrator 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.