Load Specifications
Load data in caliber .375 Whelen with .375 | 255gr | Winchester Soft-Point bullet and 22 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 36, Shooters World Buffalo Rifle and Lovex D060.
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: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 96% | 46,775 psi | 85% | 1962 fps | 98% |
| Accurate 5744 | <<locked>> | 82% | 48,196 psi | 87% | 1982 fps | 99% |
| Accurate No. 11 FS | <<locked>> | 86% | 49,647 psi | 90% | 1978 fps | 100% |
| ADI AR 2205 | <<locked>> | 88% | 48,414 psi | 88% | 1896 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 43,149 psi | 78% | 1998 fps | 99.9% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 35,273 psi | 64% | 1903 fps | 95.9% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 46,079 psi | 84% | 1995 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 28,761 psi | 52% | 1161 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 39,682 psi | 72% | 1906 fps | 97.7% |
| IMR 4227 | <<locked>> | 96% | 49,443 psi | 90% | 1985 fps | 99.8% |
| Lovex D060 | <<locked>> | 88% | 48,646 psi | 88% | 1988 fps | 99.1% |
| Lovex D063 | <<locked>> | 84% | 47,950 psi | 87% | 1972 fps | 99% |
| Lovex S053 | <<locked>> | 98% | 49,676 psi | 90% | 1982 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 39,900 psi | 72% | 1965 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 28,166 psi | 51% | 1188 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 48,080 psi | 87% | 2011 fps | 99.7% |
| Shooters World Blackout | <<locked>> | 84% | 47,950 psi | 87% | 1972 fps | 99% |
| Shooters World Buffalo Rifle | <<locked>> | 88% | 48,646 psi | 88% | 1988 fps | 99.1% |
| Shooters World SOCOM | <<locked>> | 88% | 48,791 psi | 89% | 1972 fps | 99.4% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 48,283 psi | 88% | 1857 fps | 100% |
| Vihtavuori N110 | <<locked>> | 90% | 47,239 psi | 86% | 1896 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 43,497 psi | 79% | 1969 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 88% | 36,129 psi | 66% | 1821 fps | 95.7% |
| Accurate 5744 | <<locked>> | 80% | 45,440 psi | 82% | 1949 fps | 98.6% |
| Accurate No. 11 FS | <<locked>> | 80% | 41,133 psi | 75% | 1877 fps | 99.8% |
| ADI AR 2205 | <<locked>> | 80% | 38,174 psi | 69% | 1772 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 23,815 psi | 43% | 1660 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 98% | 33,185 psi | 60% | 1867 fps | 95.2% |
| Alliant Reloder-7 | <<locked>> | 88% | 32,329 psi | 59% | 1791 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,074 psi | 38% | 1037 fps | 100% |
| IMR 4198 | <<locked>> | 92% | 31,821 psi | 58% | 1775 fps | 95.3% |
| IMR 4227 | <<locked>> | 80% | 30,893 psi | 56% | 1719 fps | 97% |
| Lovex D060 | 23.5 gr | 80% | 38,479 psi | 70% | 1847 fps | 97.3% |
| Lovex D063 | <<locked>> | 80% | 41,698 psi | 76% | 1893 fps | 98.1% |
| Lovex S053 | <<locked>> | 80% | 30,211 psi | 55% | 1716 fps | 99.4% |
| Norma 200 | <<locked>> | 92% | 31,067 psi | 56% | 1824 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,436 psi | 37% | 1056 fps | 100% |
| ReloadSwiss RS 36 | 24.5 gr | 80% | 29,573 psi | 54% | 1736 fps | 96.4% |
| Shooters World Blackout | <<locked>> | 80% | 41,698 psi | 76% | 1893 fps | 98.1% |
| Shooters World Buffalo Rifle | 23.5 gr | 80% | 38,479 psi | 70% | 1847 fps | 97.3% |
| Shooters World SOCOM | <<locked>> | 80% | 37,318 psi | 68% | 1821 fps | 97.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 28,572 psi | 52% | 1608 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 35,389 psi | 64% | 1752 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 24,265 psi | 44% | 1647 fps | 97.1% |
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 22 powders for .375 Whelen loaded with the .375 | 255gr | Winchester Soft-Point. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,011 fps; across all powders the maximum-charge window runs from 1,161 fps to 2,011 fps. ADI AR 2207 gives the best case fill at 100 %, and 22 of the 22 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. ADI AR 2207, Alliant Reloder-10x, Alliant Reloder-7 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 36, Shooters World Buffalo Rifle, Lovex D060 rank at the top here: for .375 Whelen with the .375 | 255gr | Winchester Soft-Point they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss, ReloadSwiss RS 14 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.