Load Specifications
Load data in caliber .25-35 Win. with .257 | 90gr | Hornady GMX bullet and 19 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant AR-Comp, Alliant Reloder-10x and Accurate 2015.
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: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 94% | 39,668 psi | 90% | 2556 fps | 97.7% |
| Accurate 2495ᴾ | <<locked>> | 100% | 35,940 psi | 81% | 2552 fps | 97.1% |
| Accurate LT-30 | <<locked>> | 84% | 39,175 psi | 89% | 2457 fps | 96% |
| ADI AR 2207 | <<locked>> | 82% | 37,811 psi | 85% | 2507 fps | 100% |
| Alliant AR-Comp | <<locked>> | 96% | 39,349 psi | 89% | 2635 fps | 99.6% |
| Alliant Reloder-10x | <<locked>> | 88% | 38,348 psi | 87% | 2546 fps | 98.4% |
| Alliant Reloder-7 | <<locked>> | 82% | 39,494 psi | 89% | 2510 fps | 98.9% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 39,668 psi | 90% | 2487 fps | 96.5% |
| Hodgdon H322 | <<locked>> | 90% | 39,813 psi | 90% | 2589 fps | 95.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,502 psi | 71% | 1657 fps | 100% |
| IMR 3031 | <<locked>> | 98% | 39,755 psi | 90% | 2648 fps | 96.8% |
| IMR 4198 | <<locked>> | 86% | 38,276 psi | 87% | 2500 fps | 99% |
| Norma 200 | <<locked>> | 84% | 37,913 psi | 86% | 2523 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,299 psi | 71% | 1696 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 39,117 psi | 88% | 2549 fps | 96.8% |
| Vihtavuori N120 | <<locked>> | 82% | 38,058 psi | 86% | 2474 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 39,407 psi | 89% | 2510 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 94% | 38,276 psi | 87% | 2497 fps | 97.2% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 37,840 psi | 86% | 2572 fps | 97.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | 24 gr | 88% | 32,866 psi | 74% | 2408 fps | 95.6% |
| Accurate 2495 | <<locked>> | 96% | 31,241 psi | 71% | 2448 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 82% | 36,593 psi | 83% | 2402 fps | 95.2% |
| ADI AR 2207 | <<locked>> | 80% | 35,621 psi | 81% | 2461 fps | 99.9% |
| Alliant AR-Comp | 23.2 gr | 84% | 26,803 psi | 61% | 2313 fps | 95.5% |
| Alliant Reloder-10x | 21.5 gr | 80% | 29,530 psi | 67% | 2339 fps | 95.6% |
| Alliant Reloder-7 | <<locked>> | 80% | 37,260 psi | 84% | 2464 fps | 98.5% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 37,202 psi | 84% | 2434 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 88% | 37,144 psi | 84% | 2530 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,148 psi | 52% | 1483 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 34,998 psi | 79% | 2539 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 31,763 psi | 72% | 2352 fps | 97.4% |
| Norma 200 | <<locked>> | 80% | 33,301 psi | 75% | 2421 fps | 97.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,727 psi | 51% | 1509 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 34,374 psi | 78% | 2444 fps | 95.2% |
| Vihtavuori N120 | <<locked>> | 80% | 35,824 psi | 81% | 2431 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 28,761 psi | 65% | 2267 fps | 95% |
| Vihtavuori N133 | <<locked>> | 88% | 31,879 psi | 72% | 2352 fps | 95% |
| Vihtavuori N135 | <<locked>> | 94% | 31,343 psi | 71% | 2421 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 19 powders for .25-35 Win. loaded with the .257 | 90gr | Hornady GMX. IMR 3031 delivers the highest muzzle velocity at 2,648 fps; across all powders the maximum-charge window runs from 1,657 fps to 2,648 fps. Accurate 2495 gives the best case fill at 100 %, and 19 of the 19 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 71–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.257" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, 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, Alliant Reloder-10x, Accurate 2015 rank at the top here: for .25-35 Win. with the .257 | 90gr | Hornady GMX 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.