Load Specifications
Load data in caliber .375 Whelen with .375 | 270gr | Alaska Bullet Works Kodiak PP SPBC bullet and 23 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% | 48,167 psi | 87% | 1837 fps | 97.5% |
| Accurate 5744 | <<locked>> | 84% | 47,036 psi | 85% | 1827 fps | 98.3% |
| Accurate No. 11 FS | <<locked>> | 88% | 48,298 psi | 88% | 1827 fps | 100% |
| ADI AR 2205 | <<locked>> | 90% | 47,630 psi | 86% | 1755 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 38,551 psi | 70% | 1808 fps | 99.3% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 41,539 psi | 75% | 1801 fps | 97.2% |
| Hodgdon LilGun | <<locked>> | 84% | 48,559 psi | 88% | 1850 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,688 psi | 50% | 1060 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 36,376 psi | 66% | 1719 fps | 95.9% |
| IMR 4227 | <<locked>> | 98% | 48,066 psi | 87% | 1831 fps | 99.5% |
| Lovex D060 | <<locked>> | 90% | 47,572 psi | 86% | 1834 fps | 98.4% |
| Lovex D063 | <<locked>> | 88% | 49,501 psi | 90% | 1847 fps | 98.7% |
| Lovex S040 | <<locked>> | 84% | 49,458 psi | 90% | 1755 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 48,066 psi | 87% | 1831 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 35,027 psi | 64% | 1768 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,122 psi | 49% | 1086 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 48,660 psi | 88% | 1877 fps | 99.5% |
| Shooters World Blackout | <<locked>> | 88% | 49,501 psi | 90% | 1847 fps | 98.7% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 47,572 psi | 86% | 1834 fps | 98.4% |
| Shooters World SOCOM | <<locked>> | 90% | 47,384 psi | 86% | 1818 fps | 98.8% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 44,048 psi | 80% | 1693 fps | 100% |
| Vihtavuori N110 | <<locked>> | 94% | 48,283 psi | 88% | 1778 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 39,044 psi | 71% | 1781 fps | 99.8% |
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% | 37,260 psi | 68% | 1706 fps | 95.1% |
| Accurate 5744 | <<locked>> | 80% | 42,018 psi | 76% | 1765 fps | 97.4% |
| Accurate No. 11 FS | 22.2 gr | 80% | 37,492 psi | 68% | 1699 fps | 99.1% |
| ADI AR 2205 | <<locked>> | 80% | 35,288 psi | 64% | 1608 fps | 99.7% |
| ADI AR 2207 | <<locked>> | 84% | 24,265 psi | 44% | 1558 fps | 95.1% |
| Alliant Reloder-7 | <<locked>> | 94% | 34,534 psi | 63% | 1706 fps | 95.4% |
| Hodgdon LilGun | <<locked>> | 80% | 42,598 psi | 77% | 1791 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,204 psi | 37% | 945 fps | 100% |
| IMR 4198 | <<locked>> | 98% | 34,389 psi | 62% | 1690 fps | 95.3% |
| IMR 4227 | <<locked>> | 80% | 28,572 psi | 52% | 1558 fps | 95.3% |
| Lovex D060 | 20.1 gr | 80% | 35,766 psi | 65% | 1673 fps | 95.9% |
| Lovex D063 | <<locked>> | 80% | 38,319 psi | 70% | 1713 fps | 96.7% |
| Lovex S040 | <<locked>> | 80% | 43,758 psi | 79% | 1696 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 27,456 psi | 50% | 1552 fps | 98.4% |
| Norma 200 | <<locked>> | 98% | 32,706 psi | 59% | 1732 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,943 psi | 36% | 971 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 28,384 psi | 52% | 1594 fps | 95.1% |
| Shooters World Blackout | <<locked>> | 80% | 38,319 psi | 70% | 1713 fps | 96.7% |
| Shooters World Buffalo Rifle | 20.1 gr | 80% | 35,766 psi | 65% | 1673 fps | 95.9% |
| Shooters World SOCOM | <<locked>> | 80% | 34,360 psi | 62% | 1647 fps | 96.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 26,150 psi | 47% | 1463 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 32,430 psi | 59% | 1598 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 22,104 psi | 40% | 1483 fps | 95.2% |
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 23 powders for .375 Whelen loaded with the .375 | 270gr | Alaska Bullet Works Kodiak PP SPBC. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,877 fps; across all powders the maximum-charge window runs from 1,060 fps to 1,877 fps. Accurate 1680 gives the best case fill at 100 %, and 23 of the 23 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. The 270.0 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 | 270gr | Alaska Bullet Works Kodiak PP SPBC 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.