Load Specifications
Load data in caliber .375 Whelen with .375 | 184gr | Sax MJG-HSX bullet and 9 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon LilGun, Accurate No. 11 FS and Lovex S040.
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 No. 11 FS | <<locked>> | 96% | 49,864 psi | 90% | 2303 fps | 98.1% |
| ADI AR 2205 | <<locked>> | 98% | 49,574 psi | 90% | 2228 fps | 99.3% |
| Hodgdon LilGun | <<locked>> | 92% | 48,704 psi | 88% | 2362 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 25,280 psi | 46% | 1322 fps | 100% |
| Lovex S040 | <<locked>> | 90% | 48,298 psi | 88% | 2218 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 37,652 psi | 68% | 2152 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 24,439 psi | 44% | 1355 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 35,447 psi | 64% | 2041 fps | 100% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 45,049 psi | 82% | 2228 fps | 100% |
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 No. 11 FS | 26.5 gr | 86% | 36,071 psi | 65% | 2100 fps | 95.2% |
| ADI AR 2205 | <<locked>> | 82% | 31,082 psi | 56% | 1932 fps | 95.7% |
| Hodgdon LilGun | 24.8 gr | 80% | 32,285 psi | 59% | 2126 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,347 psi | 33% | 1181 fps | 100% |
| Lovex S040 | 21.3 gr | 80% | 36,361 psi | 66% | 2044 fps | 99.8% |
| Lovex S053 | <<locked>> | 92% | 30,255 psi | 55% | 2011 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,883 psi | 32% | 1211 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 21,031 psi | 38% | 1736 fps | 98.5% |
| Vihtavuori N110 | <<locked>> | 80% | 25,324 psi | 46% | 1886 fps | 98.6% |
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 9 powders for .375 Whelen loaded with the .375 | 184gr | Sax MJG-HSX. Hodgdon LilGun delivers the highest muzzle velocity at 2,362 fps; across all powders the maximum-charge window runs from 1,322 fps to 2,362 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 9 of the 9 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 44–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, Lovex S053, ReloadSwiss RS 14 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, Accurate No. 11 FS, Lovex S040 rank at the top here: for .375 Whelen with the .375 | 184gr | Sax MJG-HSX 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.