Load Specifications
Load data in caliber .375 Whelen with .375 | 210gr | Atomic 29 HP bullet and 19 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon LilGun, 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% | 48,254 psi | 88% | 2165 fps | 96.7% |
| Accurate No. 11 FS | <<locked>> | 92% | 48,457 psi | 88% | 2159 fps | 99.3% |
| ADI AR 2205 | <<locked>> | 94% | 48,037 psi | 87% | 2083 fps | 99.9% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 33,431 psi | 61% | 2037 fps | 96.4% |
| Hodgdon LilGun | <<locked>> | 88% | 47,964 psi | 87% | 2201 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 26,092 psi | 47% | 1253 fps | 100% |
| IMR 4227ᴾ | <<locked>> | 100% | 45,324 psi | 82% | 2119 fps | 97.7% |
| Lovex D060 | <<locked>> | 94% | 48,254 psi | 88% | 2165 fps | 96.7% |
| Lovex D063 | <<locked>> | 90% | 47,384 psi | 86% | 2146 fps | 96.5% |
| Lovex S040 | <<locked>> | 86% | 47,369 psi | 86% | 2067 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 42,061 psi | 76% | 2093 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,237 psi | 46% | 1280 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 42,627 psi | 77% | 2133 fps | 97.1% |
| Shooters World Blackout | <<locked>> | 90% | 47,384 psi | 86% | 2146 fps | 96.5% |
| Shooters World Buffalo Rifle | <<locked>> | 94% | 48,254 psi | 88% | 2165 fps | 96.7% |
| Shooters World SOCOM | <<locked>> | 94% | 48,486 psi | 88% | 2146 fps | 97.3% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 39,088 psi | 71% | 1959 fps | 100% |
| Vihtavuori N110 | <<locked>> | 98% | 47,790 psi | 87% | 2119 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 34,069 psi | 62% | 2018 fps | 97.7% |
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 | <<locked>> | 84% | 42,714 psi | 78% | 2087 fps | 95.4% |
| Accurate No. 11 FS | 25.1 gr | 80% | 32,851 psi | 60% | 1929 fps | 96.3% |
| ADI AR 2205 | <<locked>> | 80% | 31,647 psi | 57% | 1837 fps | 97.8% |
| ADI AR 2207 | <<locked>> | 98% | 31,386 psi | 57% | 1998 fps | 95.7% |
| Hodgdon LilGun | 25.2 gr | 80% | 36,434 psi | 66% | 2054 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,942 psi | 34% | 1119 fps | 100% |
| IMR 4227 | <<locked>> | 92% | 35,462 psi | 64% | 1972 fps | 95.3% |
| Lovex D060 | <<locked>> | 90% | 42,714 psi | 78% | 2087 fps | 95.4% |
| Lovex D063 | <<locked>> | 86% | 41,408 psi | 75% | 2064 fps | 95.2% |
| Lovex S040 | <<locked>> | 80% | 39,320 psi | 71% | 1962 fps | 100% |
| Lovex S053 | <<locked>> | 82% | 25,034 psi | 45% | 1785 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 18,130 psi | 33% | 1138 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 94% | 35,375 psi | 64% | 2018 fps | 95.2% |
| Shooters World Blackout | <<locked>> | 86% | 41,408 psi | 75% | 2064 fps | 95.2% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 42,714 psi | 78% | 2087 fps | 95.4% |
| Shooters World SOCOM | 27.9 gr | 88% | 39,726 psi | 72% | 2028 fps | 95.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 22,698 psi | 41% | 1673 fps | 99.8% |
| Vihtavuori N110 | <<locked>> | 80% | 27,992 psi | 51% | 1827 fps | 99.9% |
| Vihtavuori N120 | <<locked>> | 92% | 26,948 psi | 49% | 1870 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 19 powders for .375 Whelen loaded with the .375 | 210gr | Atomic 29 HP. Hodgdon LilGun delivers the highest muzzle velocity at 2,201 fps; across all powders the maximum-charge window runs from 1,253 fps to 2,201 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 46–88 %, leaving at least 12 % headroom. 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. Hodgdon LilGun, Shooters World SOCOM, Accurate No. 11 FS rank at the top here: for .375 Whelen with the .375 | 210gr | Atomic 29 HP they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss 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.