Load Specifications
Load data in caliber 9 x 57 Mauser with .357 | 180gr | Impala LWHV LS bullet and 13 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant AR-Comp, Accurate 2495 and Vihtavuori N135.
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 |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 35,201 psi | 87% | 2428 fps | 96.9% |
| Accurate 2495 | <<locked>> | 96% | 34,563 psi | 85% | 2493 fps | 97.2% |
| Alliant AR-Comp | <<locked>> | 92% | 36,332 psi | 89% | 2536 fps | 99.3% |
| Alliant Reloder-10x | <<locked>> | 84% | 36,042 psi | 89% | 2461 fps | 98.3% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 36,187 psi | 89% | 2382 fps | 95.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,416 psi | 80% | 1627 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 36,738 psi | 90% | 2549 fps | 96.3% |
| IMR 4198 | <<locked>> | 82% | 35,592 psi | 88% | 2405 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,576 psi | 80% | 1670 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 36,361 psi | 90% | 2454 fps | 96.4% |
| Vihtavuori N130 | <<locked>> | 86% | 36,593 psi | 90% | 2415 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 90% | 35,694 psi | 88% | 2408 fps | 96.8% |
| Vihtavuori N135 | <<locked>> | 96% | 35,534 psi | 88% | 2490 fps | 97.2% |
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 |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 31,473 psi | 78% | 2339 fps | 95.7% |
| Accurate 2495 | 44.5 gr | 90% | 28,877 psi | 71% | 2356 fps | 95.2% |
| Alliant AR-Comp | 39.1 gr | 80% | 25,889 psi | 64% | 2251 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 32,140 psi | 79% | 2369 fps | 97.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 34,040 psi | 84% | 2336 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,149 psi | 59% | 1453 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 34,664 psi | 85% | 2500 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 33,721 psi | 83% | 2359 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,192 psi | 60% | 1490 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 34,214 psi | 84% | 2402 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 30,879 psi | 76% | 2283 fps | 96.4% |
| Vihtavuori N133 | <<locked>> | 86% | 31,981 psi | 79% | 2320 fps | 95.6% |
| Vihtavuori N135 | 43 gr | 90% | 30,037 psi | 74% | 2352 fps | 95.1% |
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 13 powders for 9 x 57 Mauser loaded with the .357 | 180gr | Impala LWHV LS. IMR 3031 delivers the highest muzzle velocity at 2,549 fps; across all powders the maximum-charge window runs from 1,627 fps to 2,549 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 13 of the 13 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 80–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.357" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, 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. Alliant AR-Comp, Accurate 2495, Vihtavuori N135 rank at the top here: for 9 x 57 Mauser with the .357 | 180gr | Impala LWHV LS 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.