Load Specifications
Load data in caliber 9 x 57 Mauser with .356 | 95gr | Rim Rock RN bullet and 7 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Lovex S053, SNPE Vectan BA6 1/2 and ReloadSwiss RS 14.
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>> | 98% | 36,419 psi | 90% | 3373 fps | 95.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 26,440 psi | 65% | 2228 fps | 100% |
| Lovex S053 | <<locked>> | 90% | 35,621 psi | 88% | 3258 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,324 psi | 62% | 2267 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 92% | 35,201 psi | 87% | 3146 fps | 100% |
| Vihtavuori N110 | <<locked>> | 84% | 35,070 psi | 86% | 3225 fps | 100% |
| Vihtavuori N120 | <<locked>> | 96% | 34,577 psi | 85% | 3281 fps | 96.6% |
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>> | 96% | 33,997 psi | 84% | 3304 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,797 psi | 46% | 1991 fps | 100% |
| Lovex S053 | 42.2 gr | 84% | 29,544 psi | 73% | 3077 fps | 95.4% |
| ReloadSwiss RS 14 | 15.4 gr | 80% | 18,086 psi | 45% | 2031 fps | 100% |
| SNPE Vectan BA6 1/2 | 36.8 gr | 80% | 24,758 psi | 61% | 2848 fps | 99.5% |
| Vihtavuori N110 | <<locked>> | 80% | 30,879 psi | 76% | 3110 fps | 99.7% |
| Vihtavuori N120 | <<locked>> | 94% | 32,518 psi | 80% | 3219 fps | 95.8% |
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 12 powders for 9 x 57 Mauser loaded with the .356 | 95gr | Rim Rock RN. ADI AR 2207 delivers the highest muzzle velocity at 3,373 fps; across all powders the maximum-charge window runs from 2,228 fps to 3,373 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 12 of the 12 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, IMR 4198, Norma 200 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. Lovex S053, SNPE Vectan BA6 1/2, ReloadSwiss RS 14 rank at the top here: for 9 x 57 Mauser with the .356 | 95gr | Rim Rock RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 4198, IMR 4227, Norma 200 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.