Load Specifications
Load data in caliber .25-35 Win. with .257 | 90gr | Winchester Soft-Point bullet and 17 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 2015 and Vihtavuori N130.
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>> | 92% | 38,856 psi | 88% | 2530 fps | 97.5% |
| Accurate 2495ᴾ | <<locked>> | 100% | 37,797 psi | 85% | 2582 fps | 97.6% |
| ADI AR 2207 | <<locked>> | 82% | 39,595 psi | 90% | 2533 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 39,552 psi | 89% | 2575 fps | 95.8% |
| Alliant AR-Comp | <<locked>> | 94% | 38,305 psi | 87% | 2605 fps | 99.4% |
| Alliant Reloder-10x | <<locked>> | 88% | 39,726 psi | 90% | 2566 fps | 98.7% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 38,218 psi | 86% | 2451 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,140 psi | 73% | 1667 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 38,725 psi | 88% | 2618 fps | 96.5% |
| IMR 4198 | <<locked>> | 86% | 39,320 psi | 89% | 2516 fps | 99.2% |
| Norma 200 | <<locked>> | 84% | 39,552 psi | 89% | 2546 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,604 psi | 71% | 1696 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 38,029 psi | 86% | 2520 fps | 96.4% |
| Vihtavuori N120 | <<locked>> | 82% | 39,711 psi | 90% | 2500 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 37,956 psi | 86% | 2474 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 94% | 39,813 psi | 90% | 2520 fps | 97.6% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 39,610 psi | 90% | 2602 fps | 97.9% |
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 | 23.6 gr | 86% | 32,329 psi | 73% | 2388 fps | 95.4% |
| Accurate 2495 | <<locked>> | 94% | 31,140 psi | 70% | 2434 fps | 95.4% |
| ADI AR 2207 | <<locked>> | 80% | 36,912 psi | 83% | 2480 fps | 100% |
| ADI AR 2219 | <<locked>> | 84% | 37,420 psi | 85% | 2530 fps | 95.1% |
| Alliant AR-Comp | 22.7 gr | 82% | 26,165 psi | 59% | 2287 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 30,850 psi | 70% | 2362 fps | 96.2% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 35,897 psi | 81% | 2402 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,395 psi | 53% | 1483 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 36,230 psi | 82% | 2562 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 33,141 psi | 75% | 2379 fps | 97.9% |
| Norma 200 | <<locked>> | 80% | 34,882 psi | 79% | 2448 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,482 psi | 53% | 1522 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 35,882 psi | 81% | 2474 fps | 95.8% |
| Vihtavuori N120 | <<locked>> | 80% | 37,057 psi | 84% | 2448 fps | 100% |
| Vihtavuori N130 | 21.7 gr | 80% | 29,979 psi | 68% | 2290 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 88% | 32,953 psi | 74% | 2372 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 94% | 32,953 psi | 74% | 2454 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 17 powders for .25-35 Win. loaded with the .257 | 90gr | Winchester Soft-Point. IMR 3031 delivers the highest muzzle velocity at 2,618 fps; across all powders the maximum-charge window runs from 1,667 fps to 2,618 fps. Accurate 2495 gives the best case fill at 100 %, and 17 of the 17 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 1:11.0 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, Accurate 2015, Vihtavuori N130 rank at the top here: for .25-35 Win. with the .257 | 90gr | Winchester Soft-Point 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.