Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .375 | 270gr | Brenneke TOG bullet and 50 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 IMR 4831.
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% | 41,495 psi | 88% | 2379 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 41,698 psi | 88% | 2415 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 39,885 psi | 85% | 2444 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 86% | 41,321 psi | 88% | 2385 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 41,626 psi | 88% | 2503 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 40,669 psi | 86% | 2405 fps | 98.6% |
| Alliant Reloder-15 | <<locked>> | 84% | 41,118 psi | 87% | 2415 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 94% | 40,219 psi | 85% | 2454 fps | 96.5% |
| Alliant Reloder-17 | <<locked>> | 90% | 40,176 psi | 85% | 2484 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,214 psi | 73% | 2352 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 41,887 psi | 89% | 2428 fps | 97% |
| Bofors RP3 | <<locked>> | 86% | 40,132 psi | 85% | 2408 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 86% | 41,495 psi | 88% | 2415 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 41,727 psi | 89% | 2448 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 41,756 psi | 89% | 2464 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,056 psi | 74% | 1558 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 41,684 psi | 88% | 2398 fps | 98.4% |
| IMR 3031 | <<locked>> | 82% | 42,554 psi | 90% | 2441 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 40,915 psi | 87% | 2369 fps | 97.4% |
| IMR 4831 | <<locked>> | 96% | 40,973 psi | 87% | 2448 fps | 96.8% |
| IMR 4895 | <<locked>> | 84% | 42,061 psi | 89% | 2444 fps | 98.2% |
| Lovex D073.6 | <<locked>> | 82% | 41,669 psi | 88% | 2411 fps | 99.8% |
| Lovex S062 | <<locked>> | 84% | 40,567 psi | 86% | 2372 fps | 98.9% |
| Norma 201 | <<locked>> | 82% | 42,192 psi | 90% | 2388 fps | 99.1% |
| Norma 202 | <<locked>> | 82% | 42,308 psi | 90% | 2398 fps | 100% |
| Norma 203B | <<locked>> | 84% | 40,437 psi | 86% | 2405 fps | 97.8% |
| Norma URP | <<locked>> | 94% | 40,205 psi | 85% | 2444 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 84% | 39,987 psi | 85% | 2418 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,447 psi | 75% | 1594 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 40,045 psi | 85% | 2454 fps | 97.2% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 40,074 psi | 85% | 2493 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 42,467 psi | 90% | 2513 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 84% | 42,554 psi | 90% | 2388 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 88% | 40,248 psi | 85% | 2402 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 41,669 psi | 88% | 2411 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 40,567 psi | 86% | 2372 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 41,553 psi | 88% | 2454 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 41,365 psi | 88% | 2398 fps | 97.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 40,901 psi | 87% | 2313 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 41,205 psi | 87% | 2408 fps | 98.4% |
| Somchem S365 | <<locked>> | 98% | 40,712 psi | 86% | 2497 fps | 99.4% |
| Vihtavuori N135 | <<locked>> | 84% | 41,814 psi | 89% | 2375 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 42,569 psi | 90% | 2382 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 41,930 psi | 89% | 2395 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 94% | 42,293 psi | 90% | 2448 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 84% | 41,017 psi | 87% | 2375 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 94% | 41,539 psi | 88% | 2451 fps | 96.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,477 psi | 77% | 2421 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 40,161 psi | 85% | 2385 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 82% | 40,741 psi | 86% | 2405 fps | 98.4% |
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% | 36,550 psi | 78% | 2293 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 34,548 psi | 73% | 2280 fps | 99.5% |
| Accurate 4350 | <<locked>> | 92% | 37,231 psi | 79% | 2392 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 34,374 psi | 73% | 2241 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 36,303 psi | 77% | 2385 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,605 psi | 71% | 2260 fps | 96.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,245 psi | 77% | 2316 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 92% | 38,014 psi | 81% | 2405 fps | 95.8% |
| Alliant Reloder-17 | 66.8 gr | 84% | 32,967 psi | 70% | 2320 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 98% | 32,198 psi | 68% | 2300 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,204 psi | 83% | 2375 fps | 96.3% |
| Bofors RP3 | <<locked>> | 80% | 32,866 psi | 70% | 2257 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 84% | 38,740 psi | 82% | 2362 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 32,518 psi | 69% | 2257 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,506 psi | 77% | 2359 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,947 psi | 55% | 1388 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,117 psi | 83% | 2346 fps | 97.9% |
| IMR 3031 | <<locked>> | 80% | 39,798 psi | 84% | 2392 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,056 psi | 76% | 2274 fps | 96.1% |
| IMR 4831 | 69.3 gr | 92% | 36,027 psi | 76% | 2352 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 37,072 psi | 79% | 2346 fps | 97% |
| Lovex D073.6 | <<locked>> | 80% | 38,856 psi | 82% | 2362 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 35,766 psi | 76% | 2280 fps | 97.9% |
| Norma 201 | <<locked>> | 80% | 39,624 psi | 84% | 2343 fps | 98.7% |
| Norma 202 | <<locked>> | 80% | 39,711 psi | 84% | 2352 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 35,607 psi | 76% | 2306 fps | 96.5% |
| Norma URP | <<locked>> | 92% | 37,753 psi | 80% | 2395 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 34,867 psi | 74% | 2313 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,223 psi | 56% | 1421 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 37,449 psi | 79% | 2402 fps | 96.4% |
| ReloadSwiss RS 60 | 63.7 gr | 80% | 30,951 psi | 66% | 2277 fps | 97.5% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 37,144 psi | 79% | 2408 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 37,681 psi | 80% | 2297 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 80% | 31,009 psi | 66% | 2208 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,856 psi | 82% | 2362 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 35,766 psi | 76% | 2280 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 34,200 psi | 73% | 2300 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,899 psi | 83% | 2352 fps | 97.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,953 psi | 72% | 2185 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 32,126 psi | 68% | 2221 fps | 95.8% |
| Somchem S365 | <<locked>> | 86% | 27,963 psi | 59% | 2195 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 36,782 psi | 78% | 2290 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,507 psi | 80% | 2293 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 30,371 psi | 64% | 2162 fps | 96.7% |
| Vihtavuori N160 | <<locked>> | 90% | 37,246 psi | 79% | 2349 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 36,071 psi | 77% | 2280 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 92% | 38,856 psi | 82% | 2402 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 98% | 34,214 psi | 73% | 2372 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,024 psi | 66% | 2185 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,087 psi | 81% | 2352 fps | 97.8% |
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 50 powders for .375 Fl. Mag. N.E. loaded with the .375 | 270gr | Brenneke TOG. ReloadSwiss RS 62 delivers the highest muzzle velocity at 2,513 fps; across all powders the maximum-charge window runs from 1,558 fps to 2,513 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 50 of the 50 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 270.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, 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, IMR 4831 rank at the top here: for .375 Fl. Mag. N.E. with the .375 | 270gr | Brenneke TOG 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.