Load Specifications
Load data in caliber .375 Win. with .375 | 235gr | Speer Hot-Cor bullet and 21 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Shooters World Buffalo Rifle, Lovex D060 and Accurate 5744.
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 1680ᴾ | <<locked>> | 100% | 47,877 psi | 87% | 2031 fps | 96.7% |
| Accurate 5744 | <<locked>> | 88% | 47,195 psi | 86% | 2028 fps | 97.8% |
| Accurate No. 11 FS | <<locked>> | 88% | 47,747 psi | 87% | 2021 fps | 99.8% |
| ADI AR 2205 | <<locked>> | 90% | 47,007 psi | 85% | 1942 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 38,087 psi | 69% | 1991 fps | 98.8% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 41,104 psi | 75% | 1988 fps | 96.3% |
| Hodgdon LilGun | <<locked>> | 84% | 48,022 psi | 87% | 2054 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,862 psi | 51% | 1191 fps | 100% |
| IMR 4227 | <<locked>> | 98% | 47,166 psi | 86% | 2021 fps | 99% |
| Lovex D060 | <<locked>> | 92% | 49,647 psi | 90% | 2060 fps | 98.2% |
| Lovex D063 | <<locked>> | 90% | 46,833 psi | 85% | 2008 fps | 98.2% |
| Lovex S040 | <<locked>> | 84% | 48,979 psi | 89% | 1949 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 47,166 psi | 86% | 2024 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,166 psi | 49% | 1217 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 48,008 psi | 87% | 2073 fps | 99.1% |
| Shooters World Blackout | <<locked>> | 88% | 49,269 psi | 89% | 2047 fps | 98.2% |
| Shooters World Buffalo Rifle | <<locked>> | 92% | 49,647 psi | 90% | 2060 fps | 98.2% |
| Shooters World SOCOM | <<locked>> | 90% | 46,833 psi | 85% | 2008 fps | 98.2% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 43,555 psi | 79% | 1880 fps | 100% |
| Vihtavuori N110 | <<locked>> | 94% | 47,863 psi | 87% | 1978 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 38,595 psi | 70% | 1969 fps | 99.5% |
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>> | 96% | 41,771 psi | 76% | 1952 fps | 95.4% |
| Accurate 5744 | 23.1 gr | 80% | 37,333 psi | 68% | 1880 fps | 95.5% |
| Accurate No. 11 FS | <<locked>> | 80% | 36,854 psi | 67% | 1877 fps | 98.6% |
| ADI AR 2205 | <<locked>> | 80% | 34,853 psi | 63% | 1778 fps | 99.3% |
| ADI AR 2207 | <<locked>> | 88% | 26,803 psi | 49% | 1781 fps | 95.4% |
| Alliant Reloder-7 | <<locked>> | 96% | 36,260 psi | 66% | 1916 fps | 95% |
| Hodgdon LilGun | <<locked>> | 80% | 42,221 psi | 77% | 1988 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,102 psi | 36% | 1056 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 31,589 psi | 57% | 1785 fps | 95.6% |
| Lovex D060 | 23.1 gr | 82% | 37,333 psi | 68% | 1880 fps | 95.5% |
| Lovex D063 | <<locked>> | 80% | 34,098 psi | 62% | 1821 fps | 95.3% |
| Lovex S040 | <<locked>> | 80% | 43,540 psi | 79% | 1886 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 26,890 psi | 49% | 1709 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,754 psi | 36% | 1083 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 31,531 psi | 57% | 1827 fps | 95.5% |
| Shooters World Blackout | <<locked>> | 80% | 38,058 psi | 69% | 1893 fps | 95.9% |
| Shooters World Buffalo Rifle | 23.1 gr | 82% | 37,333 psi | 68% | 1880 fps | 95.5% |
| Shooters World SOCOM | <<locked>> | 80% | 34,098 psi | 62% | 1821 fps | 95.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 25,918 psi | 47% | 1624 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 32,140 psi | 58% | 1772 fps | 100% |
| Vihtavuori N120 | <<locked>> | 84% | 24,482 psi | 44% | 1703 fps | 95.6% |
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 27 powders for .375 Win. loaded with the .375 | 235gr | Speer Hot-Cor. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,073 fps; across all powders the maximum-charge window runs from 1,191 fps to 2,073 fps. Accurate 1680 gives the best case fill at 100 %, and 27 of the 27 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. Accurate 1680, Accurate LT-30, ADI AR 2207 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. Shooters World Buffalo Rifle, Lovex D060, Accurate 5744 rank at the top here: for .375 Win. with the .375 | 235gr | Speer Hot-Cor they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate LT-30, Alliant Reloder-10x, Hodgdon H4198 burn incompletely and react more sensitively to barrel length and temperature. 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.