Load Specifications
Load data in caliber 9 x 57 Mauser with .355 | 116.6gr | Peregrine VRG6 Solid bullet and 8 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2207, Vihtavuori N120 and SNPE Vectan BA6 1/2.
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>> | 92% | 35,911 psi | 88% | 3071 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 28,311 psi | 70% | 2024 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 36,187 psi | 89% | 2966 fps | 96.5% |
| Lovex S053 | <<locked>> | 84% | 34,679 psi | 85% | 2940 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,470 psi | 68% | 2064 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 34,737 psi | 86% | 2972 fps | 95.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 36,477 psi | 90% | 2864 fps | 100% |
| Vihtavuori N120 | <<locked>> | 92% | 36,303 psi | 89% | 3041 fps | 98.9% |
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 | 44.1 gr | 86% | 29,530 psi | 73% | 2894 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,407 psi | 50% | 1811 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 33,968 psi | 84% | 2910 fps | 95.8% |
| Lovex S053 | <<locked>> | 80% | 30,821 psi | 76% | 2835 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,914 psi | 49% | 1850 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 32,663 psi | 80% | 2917 fps | 95.1% |
| SNPE Vectan BA6 1/2 | 36 gr | 80% | 29,022 psi | 71% | 2687 fps | 100% |
| Vihtavuori N120 | 42.1 gr | 82% | 26,455 psi | 65% | 2759 fps | 95.6% |
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 14 powders for 9 x 57 Mauser loaded with the .355 | 116.6gr | Peregrine VRG6 Solid. ADI AR 2207 delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 2,024 fps to 3,071 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 14 of the 14 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 68–90 %, leaving at least 10 % headroom. 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. ADI AR 2207, Vihtavuori N120, SNPE Vectan BA6 1/2 rank at the top here: for 9 x 57 Mauser with the .355 | 116.6gr | Peregrine VRG6 Solid they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 1680, Alliant Reloder-10x, Alliant Reloder-7 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.