Load Specifications
Load data in caliber .375 Win. with .375 | 200gr | Sierra Pro-Hunter 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 Shooters World SOCOM.
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% | 49,298 psi | 89% | 2316 fps | 96.6% |
| Accurate 5744 | <<locked>> | 84% | 47,848 psi | 87% | 2313 fps | 97.5% |
| Accurate No. 11 FS | <<locked>> | 88% | 48,849 psi | 89% | 2306 fps | 99.7% |
| ADI AR 2205 | <<locked>> | 90% | 48,225 psi | 88% | 2224 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 39,320 psi | 71% | 2274 fps | 98.6% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 42,090 psi | 76% | 2264 fps | 96% |
| Hodgdon LilGun | <<locked>> | 84% | 49,734 psi | 90% | 2349 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,978 psi | 51% | 1368 fps | 100% |
| IMR 4227 | <<locked>> | 98% | 48,588 psi | 88% | 2310 fps | 98.9% |
| Lovex D060 | <<locked>> | 90% | 47,848 psi | 87% | 2313 fps | 97.5% |
| Lovex D063 | <<locked>> | 90% | 47,979 psi | 87% | 2290 fps | 98.1% |
| Lovex S040 | <<locked>> | 84% | 49,777 psi | 90% | 2231 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 48,515 psi | 88% | 2316 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,195 psi | 49% | 1398 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 49,443 psi | 90% | 2365 fps | 98.9% |
| Shooters World Blackout | <<locked>> | 86% | 47,065 psi | 85% | 2290 fps | 97.4% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 47,848 psi | 87% | 2313 fps | 97.5% |
| Shooters World SOCOM | <<locked>> | 90% | 47,979 psi | 87% | 2290 fps | 98.1% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 44,802 psi | 81% | 2152 fps | 100% |
| Vihtavuori N110 | <<locked>> | 94% | 48,805 psi | 89% | 2260 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 39,740 psi | 72% | 2247 fps | 99.4% |
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% | 43,105 psi | 78% | 2231 fps | 95.3% |
| Accurate 5744 | <<locked>> | 80% | 42,134 psi | 76% | 2218 fps | 96.3% |
| Accurate No. 11 FS | <<locked>> | 80% | 37,869 psi | 69% | 2142 fps | 98.4% |
| ADI AR 2205 | <<locked>> | 80% | 35,578 psi | 65% | 2034 fps | 99.2% |
| ADI AR 2207 | <<locked>> | 88% | 27,615 psi | 50% | 2034 fps | 95.1% |
| Alliant Reloder-7 | <<locked>> | 98% | 39,914 psi | 72% | 2228 fps | 95.5% |
| Hodgdon LilGun | <<locked>> | 80% | 43,395 psi | 79% | 2270 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,450 psi | 37% | 1220 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 32,169 psi | 58% | 2034 fps | 95.2% |
| Lovex D060 | 27.5 gr | 82% | 38,348 psi | 70% | 2152 fps | 95.2% |
| Lovex D063 | <<locked>> | 82% | 36,956 psi | 67% | 2116 fps | 95.6% |
| Lovex S040 | <<locked>> | 80% | 44,208 psi | 80% | 2159 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 27,615 psi | 50% | 1952 fps | 97.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,725 psi | 36% | 1243 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 32,561 psi | 59% | 2090 fps | 95.2% |
| Shooters World Blackout | <<locked>> | 80% | 38,798 psi | 70% | 2159 fps | 95.5% |
| Shooters World Buffalo Rifle | 27.5 gr | 82% | 38,348 psi | 70% | 2152 fps | 95.2% |
| Shooters World SOCOM | 30.6 gr | 82% | 36,956 psi | 67% | 2116 fps | 95.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 26,397 psi | 48% | 1854 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 32,576 psi | 59% | 2021 fps | 100% |
| Vihtavuori N120 | <<locked>> | 84% | 24,932 psi | 45% | 1936 fps | 95.1% |
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 27 powders for .375 Win. loaded with the .375 | 200gr | Sierra Pro-Hunter. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,365 fps; across all powders the maximum-charge window runs from 1,368 fps to 2,365 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, Shooters World SOCOM rank at the top here: for .375 Win. with the .375 | 200gr | Sierra Pro-Hunter 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.