Load Specifications
Load data in caliber 9 x 57 Mauser with .355 | 154gr | Geco FMJ FLAT NOSE bullet and 12 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma 200, Alliant AR-Comp and IMR 4198.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 82% | 34,983 psi | 86% | 2566 fps | 96.2% |
| ADI AR 2207 | <<locked>> | 88% | 36,608 psi | 90% | 2700 fps | 99.6% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 34,911 psi | 86% | 2726 fps | 97.6% |
| Alliant Reloder-10x | <<locked>> | 94% | 36,027 psi | 89% | 2707 fps | 96.8% |
| Alliant Reloder-7 | <<locked>> | 86% | 35,940 psi | 89% | 2638 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,515 psi | 73% | 1745 fps | 100% |
| IMR 4198 | <<locked>> | 90% | 35,317 psi | 87% | 2628 fps | 97.3% |
| Norma 200 | <<locked>> | 90% | 35,621 psi | 88% | 2687 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 28,819 psi | 71% | 1785 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 36,738 psi | 90% | 2470 fps | 100% |
| Vihtavuori N120 | <<locked>> | 86% | 34,476 psi | 85% | 2615 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 94% | 35,186 psi | 87% | 2618 fps | 96.1% |
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 1680 | <<locked>> | 80% | 32,793 psi | 81% | 2513 fps | 95.4% |
| ADI AR 2207 | <<locked>> | 80% | 27,862 psi | 69% | 2487 fps | 97.8% |
| Alliant AR-Comp | 47.4 gr | 96% | 30,821 psi | 76% | 2618 fps | 96% |
| Alliant Reloder-10x | <<locked>> | 90% | 31,662 psi | 78% | 2602 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 29,617 psi | 73% | 2480 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,422 psi | 53% | 1562 fps | 100% |
| IMR 4198 | 38.4 gr | 84% | 29,399 psi | 72% | 2474 fps | 95.1% |
| Norma 200 | 41.9 gr | 84% | 29,051 psi | 72% | 2523 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,784 psi | 51% | 1591 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 32,735 psi | 81% | 2392 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 28,224 psi | 70% | 2464 fps | 98.9% |
| Vihtavuori N130 | <<locked>> | 92% | 33,170 psi | 82% | 2572 fps | 95.4% |
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 .355 | 154gr | Geco FMJ FLAT NOSE. Alliant AR-Comp delivers the highest muzzle velocity at 2,726 fps; across all powders the maximum-charge window runs from 1,745 fps to 2,726 fps. Alliant AR-Comp 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 71–90 %, leaving at least 10 % headroom. Alliant AR-Comp, 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. Norma 200, Alliant AR-Comp, IMR 4198 rank at the top here: for 9 x 57 Mauser with the .355 | 154gr | Geco FMJ FLAT NOSE 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.