Load Specifications
Load data in caliber .375 Whelen with .374 | 235gr | Rhino Penetrator bullet and 19 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate 5744, Shooters World SOCOM and Accurate No. 11 FS.
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 5744 | <<locked>> | 88% | 48,631 psi | 88% | 1978 fps | 97% |
| Accurate No. 11 FS | <<locked>> | 92% | 49,110 psi | 89% | 1975 fps | 99.5% |
| ADI AR 2205 | <<locked>> | 94% | 48,689 psi | 88% | 1903 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 33,605 psi | 61% | 1860 fps | 96.8% |
| Hodgdon LilGun | <<locked>> | 88% | 48,631 psi | 88% | 2011 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 26,847 psi | 49% | 1138 fps | 100% |
| IMR 4227ᴾ | <<locked>> | 100% | 45,324 psi | 82% | 1932 fps | 97.9% |
| Lovex D060 | <<locked>> | 94% | 48,095 psi | 87% | 1972 fps | 96.9% |
| Lovex D063 | <<locked>> | 90% | 47,761 psi | 87% | 1962 fps | 96.9% |
| Lovex S040 | <<locked>> | 86% | 47,398 psi | 86% | 1880 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 42,438 psi | 77% | 1913 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,744 psi | 47% | 1161 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 43,105 psi | 78% | 1949 fps | 97.5% |
| Shooters World Blackout | <<locked>> | 90% | 47,761 psi | 87% | 1962 fps | 96.9% |
| Shooters World Buffalo Rifle | <<locked>> | 94% | 48,095 psi | 87% | 1972 fps | 96.9% |
| Shooters World SOCOM | <<locked>> | 94% | 48,515 psi | 88% | 1959 fps | 97.5% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 39,653 psi | 72% | 1788 fps | 100% |
| Vihtavuori N110 | <<locked>> | 98% | 48,153 psi | 87% | 1929 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 34,214 psi | 62% | 1841 fps | 98% |
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 5744 | 22.1 gr | 82% | 40,625 psi | 74% | 1870 fps | 95.2% |
| Accurate No. 11 FS | 22.2 gr | 80% | 33,185 psi | 60% | 1762 fps | 96.8% |
| ADI AR 2205 | <<locked>> | 80% | 32,198 psi | 58% | 1683 fps | 98.2% |
| ADI AR 2207 | <<locked>> | 96% | 29,994 psi | 54% | 1795 fps | 95.5% |
| Hodgdon LilGun | <<locked>> | 80% | 37,304 psi | 68% | 1880 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,595 psi | 36% | 1017 fps | 100% |
| IMR 4227 | <<locked>> | 90% | 34,185 psi | 62% | 1775 fps | 95.3% |
| Lovex D060 | <<locked>> | 88% | 40,625 psi | 74% | 1870 fps | 95.2% |
| Lovex D063 | <<locked>> | 86% | 41,597 psi | 75% | 1883 fps | 95.5% |
| Lovex S040 | <<locked>> | 80% | 39,958 psi | 73% | 1791 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 24,294 psi | 44% | 1604 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 18,884 psi | 34% | 1037 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 92% | 33,968 psi | 62% | 1814 fps | 95.1% |
| Shooters World Blackout | <<locked>> | 86% | 41,597 psi | 75% | 1883 fps | 95.5% |
| Shooters World Buffalo Rifle | <<locked>> | 88% | 40,625 psi | 74% | 1870 fps | 95.2% |
| Shooters World SOCOM | 24.7 gr | 88% | 39,885 psi | 72% | 1850 fps | 95.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 23,511 psi | 43% | 1535 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 28,587 psi | 52% | 1670 fps | 100% |
| Vihtavuori N120 | <<locked>> | 90% | 25,904 psi | 47% | 1683 fps | 95% |
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 19 powders for .375 Whelen loaded with the .374 | 235gr | Rhino Penetrator. Hodgdon LilGun delivers the highest muzzle velocity at 2,011 fps; across all powders the maximum-charge window runs from 1,138 fps to 2,011 fps. ADI AR 2207 gives the best case fill at 100 %, and 19 of the 19 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 47–89 %, leaving at least 11 % headroom. The 235.0 gr projectile in 0.374" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. ADI AR 2207, Hodgdon TrailBoss, IMR 4227 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. Accurate 5744, Shooters World SOCOM, Accurate No. 11 FS rank at the top here: for .375 Whelen with the .374 | 235gr | Rhino Penetrator 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.