Load Specifications
Load data in caliber .375 Whelen with .375 | 160gr | Sax MJG-SX bullet and 8 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon LilGun, Lovex S040 and Vihtavuori N110.
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 |
|---|---|---|---|---|---|---|
| ADI APS 450 | <<locked>> | 82% | 47,921 psi | 87% | 1726 fps | 100% |
| ADI AR 2205ᴾ | <<locked>> | 100% | 43,221 psi | 78% | 2215 fps | 95.8% |
| Hodgdon LilGunᴾ | <<locked>> | 100% | 47,892 psi | 87% | 2480 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 23,090 psi | 42% | 1358 fps | 100% |
| Lovex S040 | <<locked>> | 96% | 47,065 psi | 85% | 2300 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 22,162 psi | 40% | 1388 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 28,224 psi | 51% | 2001 fps | 98.7% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 35,404 psi | 64% | 2192 fps | 99% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI APS 450 | <<locked>> | 80% | 46,064 psi | 84% | 1703 fps | 100% |
| ADI AR 2205 | <<locked>> | 98% | 40,843 psi | 74% | 2178 fps | 95.2% |
| Hodgdon LilGun | 22.2 gr | 80% | 24,497 psi | 44% | 2054 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 16,708 psi | 30% | 1211 fps | 100% |
| Lovex S040 | 19 gr | 80% | 29,602 psi | 54% | 2001 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 15,940 psi | 29% | 1234 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 19,841 psi | 36% | 1775 fps | 95% |
| Vihtavuori N110 | 19.7 gr | 86% | 23,743 psi | 43% | 1939 fps | 95.3% |
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 8 powders for .375 Whelen loaded with the .375 | 160gr | Sax MJG-SX. Hodgdon LilGun delivers the highest muzzle velocity at 2,480 fps; across all powders the maximum-charge window runs from 1,358 fps to 2,480 fps. ADI AR 2205 gives the best case fill at 100 %, and 8 of the 8 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 40–87 %, leaving at least 13 % headroom. The 160.0 gr projectile in 0.375" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. ADI AR 2205, Hodgdon LilGun, Hodgdon TrailBoss 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, Lovex S040, Vihtavuori N110 rank at the top here: for .375 Whelen with the .375 | 160gr | Sax MJG-SX they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.