Load Specifications
Load data in caliber .375 Win. with .375 | 270gr | Hornady InterLock RN bullet and 22 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 Blackout.
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% | 45,411 psi | 82% | 1880 fps | 97.9% |
| Accurate 5744 | <<locked>> | 86% | 48,167 psi | 87% | 1909 fps | 99.1% |
| Accurate No. 11 FS | <<locked>> | 90% | 48,733 psi | 88% | 1900 fps | 100% |
| ADI AR 2205 | <<locked>> | 92% | 47,587 psi | 86% | 1821 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 34,722 psi | 63% | 1831 fps | 99.4% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 37,463 psi | 68% | 1827 fps | 97.3% |
| Hodgdon LilGun | <<locked>> | 86% | 47,543 psi | 86% | 1909 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 24,743 psi | 45% | 1079 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 33,040 psi | 60% | 1745 fps | 96.1% |
| IMR 4227ᴾ | <<locked>> | 100% | 48,109 psi | 87% | 1900 fps | 99.8% |
| Lovex D060 | <<locked>> | 92% | 48,167 psi | 87% | 1909 fps | 99.1% |
| Lovex D063 | <<locked>> | 88% | 47,094 psi | 85% | 1893 fps | 99% |
| Lovex S040 | <<locked>> | 84% | 46,369 psi | 84% | 1788 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 44,382 psi | 81% | 1864 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 23,018 psi | 42% | 1102 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 45,745 psi | 83% | 1916 fps | 99.7% |
| Shooters World Blackout | <<locked>> | 88% | 47,094 psi | 85% | 1893 fps | 99% |
| Shooters World Buffalo Rifle | <<locked>> | 92% | 48,167 psi | 87% | 1909 fps | 99.1% |
| Shooters World SOCOM | <<locked>> | 92% | 47,979 psi | 87% | 1890 fps | 99.4% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 40,843 psi | 74% | 1722 fps | 100% |
| Vihtavuori N110 | <<locked>> | 96% | 47,413 psi | 86% | 1841 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 35,418 psi | 64% | 1808 fps | 99.9% |
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>> | 92% | 33,373 psi | 61% | 1726 fps | 95.2% |
| Accurate 5744 | <<locked>> | 80% | 39,059 psi | 71% | 1798 fps | 97.7% |
| Accurate No. 11 FS | <<locked>> | 80% | 33,823 psi | 61% | 1722 fps | 99.2% |
| ADI AR 2205 | <<locked>> | 80% | 31,923 psi | 58% | 1634 fps | 99.7% |
| ADI AR 2207 | <<locked>> | 86% | 21,277 psi | 39% | 1581 fps | 95% |
| Alliant Reloder-7 | <<locked>> | 94% | 30,240 psi | 55% | 1722 fps | 95.2% |
| Hodgdon LilGun | <<locked>> | 80% | 37,666 psi | 68% | 1811 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 17,114 psi | 31% | 961 fps | 100% |
| IMR 4198 | <<locked>> | 98% | 31,140 psi | 56% | 1713 fps | 95.4% |
| IMR 4227 | <<locked>> | 80% | 24,961 psi | 45% | 1568 fps | 95.1% |
| Lovex D060 | 21.6 gr | 80% | 32,634 psi | 59% | 1699 fps | 96% |
| Lovex D063 | <<locked>> | 80% | 35,230 psi | 64% | 1742 fps | 96.9% |
| Lovex S040 | <<locked>> | 80% | 40,886 psi | 74% | 1732 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 22,960 psi | 42% | 1549 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 15,432 psi | 28% | 971 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 26,266 psi | 48% | 1637 fps | 95.6% |
| Shooters World Blackout | 24.1 gr | 80% | 35,230 psi | 64% | 1742 fps | 96.9% |
| Shooters World Buffalo Rifle | 21.6 gr | 80% | 32,634 psi | 59% | 1699 fps | 96% |
| Shooters World SOCOM | <<locked>> | 80% | 31,053 psi | 56% | 1670 fps | 96.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 22,292 psi | 40% | 1473 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 27,702 psi | 50% | 1608 fps | 100% |
| Vihtavuori N120 | <<locked>> | 82% | 19,276 psi | 35% | 1506 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 22 powders for .375 Win. loaded with the .375 | 270gr | Hornady InterLock RN. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,916 fps; across all powders the maximum-charge window runs from 1,079 fps to 1,916 fps. Accurate 1680 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 42–88 %, leaving at least 12 % headroom. Accurate 1680, ADI AR 2207, 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. Shooters World Buffalo Rifle, Lovex D060, Shooters World Blackout rank at the top here: for .375 Win. with the .375 | 270gr | Hornady InterLock RN 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.