Load Specifications
Load data in caliber 9 x 57 Mauser with .358 | 140gr | Peregrine Hog bullet and 10 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 4198, ReloadSwiss RS 14 and Hodgdon TrailBoss.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2207 | <<locked>> | 86% | 34,606 psi | 85% | 2802 fps | 99.1% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 35,433 psi | 87% | 2877 fps | 97.1% |
| Alliant Reloder-10x | <<locked>> | 94% | 36,564 psi | 90% | 2861 fps | 96.3% |
| Alliant Reloder-7 | <<locked>> | 86% | 36,448 psi | 90% | 2792 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,646 psi | 73% | 1867 fps | 100% |
| IMR 4198 | <<locked>> | 90% | 35,607 psi | 88% | 2779 fps | 96.8% |
| Norma 200 | <<locked>> | 90% | 36,390 psi | 90% | 2848 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 29,196 psi | 72% | 1909 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 34,824 psi | 86% | 2579 fps | 100% |
| Vihtavuori N120 | <<locked>> | 86% | 34,896 psi | 86% | 2769 fps | 99.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2207 | <<locked>> | 80% | 28,282 psi | 70% | 2631 fps | 97.3% |
| Alliant AR-Comp | <<locked>> | 96% | 31,227 psi | 77% | 2759 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 92% | 34,345 psi | 85% | 2808 fps | 95.6% |
| Alliant Reloder-7 | <<locked>> | 82% | 32,053 psi | 79% | 2680 fps | 95.3% |
| Hodgdon TrailBoss | 14.7 gr | 80% | 21,451 psi | 53% | 1667 fps | 100% |
| IMR 4198 | 42.1 gr | 86% | 31,589 psi | 78% | 2671 fps | 95.3% |
| Norma 200 | <<locked>> | 86% | 31,720 psi | 78% | 2730 fps | 95.6% |
| ReloadSwiss RS 14 | 15 gr | 80% | 21,060 psi | 52% | 1703 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 32,909 psi | 81% | 2539 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 28,631 psi | 71% | 2612 fps | 98.5% |
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 22 powders for 9 x 57 Mauser loaded with the .358 | 140gr | Peregrine Hog. Alliant AR-Comp delivers the highest muzzle velocity at 2,877 fps; across all powders the maximum-charge window runs from 1,867 fps to 2,877 fps. Alliant AR-Comp gives the best case fill at 100 %, and 22 of the 22 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. Alliant AR-Comp, Hodgdon TrailBoss, IMR 3031 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. IMR 4198, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for 9 x 57 Mauser with the .358 | 140gr | Peregrine Hog they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2015, Accurate LT-30, ADI AR 2219 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.