Load Specifications
Load data in caliber .375 Whelen with .375 | 250gr | NorthFork Bonded Core 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 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 1680ᴾ | <<locked>> | 100% | 45,571 psi | 83% | 1886 fps | 96.1% |
| Accurate 5744 | <<locked>> | 86% | 47,993 psi | 87% | 1919 fps | 97.8% |
| Accurate No. 11 FS | <<locked>> | 90% | 48,805 psi | 89% | 1916 fps | 99.8% |
| ADI AR 2205 | <<locked>> | 92% | 48,066 psi | 87% | 1841 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 36,434 psi | 66% | 1857 fps | 98.4% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 38,870 psi | 71% | 1844 fps | 95.6% |
| Hodgdon LilGun | <<locked>> | 86% | 48,834 psi | 89% | 1946 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,456 psi | 50% | 1109 fps | 100% |
| IMR 4227ᴾ | <<locked>> | 100% | 48,240 psi | 88% | 1913 fps | 99% |
| Lovex D060 | <<locked>> | 92% | 47,993 psi | 87% | 1919 fps | 97.8% |
| Lovex D063 | <<locked>> | 88% | 47,369 psi | 86% | 1906 fps | 97.7% |
| Lovex S040 | <<locked>> | 84% | 47,384 psi | 86% | 1818 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 45,281 psi | 82% | 1890 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 26,789 psi | 49% | 1138 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 46,166 psi | 84% | 1932 fps | 98.7% |
| Shooters World Blackout | <<locked>> | 88% | 47,369 psi | 86% | 1906 fps | 97.7% |
| Shooters World Buffalo Rifle | <<locked>> | 92% | 47,993 psi | 87% | 1919 fps | 97.8% |
| Shooters World SOCOM | <<locked>> | 92% | 47,979 psi | 87% | 1903 fps | 98.2% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 41,872 psi | 76% | 1752 fps | 100% |
| Vihtavuori N110 | <<locked>> | 96% | 48,559 psi | 88% | 1870 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 36,985 psi | 67% | 1834 fps | 99.2% |
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>> | 98% | 42,540 psi | 77% | 1850 fps | 95.4% |
| Accurate 5744 | <<locked>> | 80% | 40,176 psi | 73% | 1814 fps | 96.1% |
| Accurate No. 11 FS | 22.5 gr | 80% | 35,505 psi | 64% | 1749 fps | 98.2% |
| ADI AR 2205 | <<locked>> | 80% | 33,808 psi | 61% | 1660 fps | 99.1% |
| ADI AR 2207 | <<locked>> | 90% | 27,180 psi | 49% | 1690 fps | 95.5% |
| Alliant Reloder-7 | <<locked>> | 98% | 36,724 psi | 67% | 1814 fps | 95% |
| Hodgdon LilGun | <<locked>> | 80% | 39,943 psi | 72% | 1850 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,769 psi | 36% | 984 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 30,269 psi | 55% | 1660 fps | 95% |
| Lovex D060 | 20.9 gr | 82% | 36,347 psi | 66% | 1755 fps | 95% |
| Lovex D063 | <<locked>> | 80% | 36,361 psi | 66% | 1759 fps | 95.2% |
| Lovex S040 | <<locked>> | 80% | 42,018 psi | 76% | 1759 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 25,788 psi | 47% | 1591 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,464 psi | 35% | 1014 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 88% | 32,184 psi | 58% | 1736 fps | 95.6% |
| Shooters World Blackout | <<locked>> | 80% | 36,361 psi | 66% | 1759 fps | 95.2% |
| Shooters World Buffalo Rifle | 20.9 gr | 82% | 36,347 psi | 66% | 1755 fps | 95% |
| Shooters World SOCOM | <<locked>> | 82% | 34,940 psi | 63% | 1729 fps | 95.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 24,990 psi | 45% | 1516 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 30,850 psi | 56% | 1654 fps | 100% |
| Vihtavuori N120 | <<locked>> | 86% | 24,801 psi | 45% | 1614 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 21 powders for .375 Whelen loaded with the .375 | 250gr | NorthFork Bonded Core. Hodgdon LilGun delivers the highest muzzle velocity at 1,946 fps; across all powders the maximum-charge window runs from 1,109 fps to 1,946 fps. Accurate 1680 gives the best case fill at 100 %, and 21 of the 21 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 49–89 %, leaving at least 11 % headroom. The 250.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. 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, Accurate No. 11 FS rank at the top here: for .375 Whelen with the .375 | 250gr | NorthFork Bonded Core 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.