Load Specifications
Load data in caliber .25-35 Win. with .257 | 87gr | Winchester Pointed 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, 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>> | 92% | 37,652 psi | 85% | 2546 fps | 96.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 36,318 psi | 82% | 2592 fps | 96.8% |
| ADI AR 2207 | <<locked>> | 82% | 38,493 psi | 87% | 2556 fps | 100% |
| Alliant AR-Comp | <<locked>> | 96% | 39,320 psi | 89% | 2667 fps | 99.3% |
| Alliant Reloder-10x | <<locked>> | 88% | 38,566 psi | 87% | 2582 fps | 98.1% |
| Alliant Reloder-7 | <<locked>> | 82% | 39,740 psi | 90% | 2546 fps | 98.7% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 39,595 psi | 90% | 2516 fps | 96% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,923 psi | 72% | 1693 fps | 100% |
| IMR 3031 | <<locked>> | 98% | 39,697 psi | 90% | 2680 fps | 96.3% |
| IMR 4198 | <<locked>> | 86% | 38,348 psi | 87% | 2536 fps | 98.8% |
| Norma 200 | <<locked>> | 84% | 38,377 psi | 87% | 2562 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,357 psi | 71% | 1722 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 39,117 psi | 88% | 2582 fps | 96.3% |
| Vihtavuori N120 | <<locked>> | 82% | 38,609 psi | 87% | 2520 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 39,508 psi | 89% | 2546 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 94% | 38,696 psi | 87% | 2536 fps | 96.9% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 38,334 psi | 87% | 2615 fps | 97.2% |
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 | 24.1 gr | 88% | 33,170 psi | 75% | 2448 fps | 95.3% |
| Accurate 2495 | <<locked>> | 96% | 31,749 psi | 72% | 2487 fps | 95.2% |
| ADI AR 2207 | <<locked>> | 80% | 35,868 psi | 81% | 2500 fps | 99.8% |
| Alliant AR-Comp | 23.3 gr | 84% | 27,151 psi | 61% | 2349 fps | 95.1% |
| Alliant Reloder-10x | 21.6 gr | 80% | 29,936 psi | 68% | 2379 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 37,536 psi | 85% | 2503 fps | 98.3% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 37,231 psi | 84% | 2467 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,221 psi | 52% | 1506 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 37,565 psi | 85% | 2631 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 32,329 psi | 73% | 2395 fps | 97.2% |
| Norma 200 | <<locked>> | 80% | 33,837 psi | 76% | 2464 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,279 psi | 53% | 1545 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 36,970 psi | 84% | 2536 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 36,027 psi | 81% | 2470 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 30,850 psi | 70% | 2349 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 90% | 34,272 psi | 77% | 2438 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 96% | 33,765 psi | 76% | 2510 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 17 powders for .25-35 Win. loaded with the .257 | 87gr | Winchester Pointed Soft Point. IMR 3031 delivers the highest muzzle velocity at 2,680 fps; across all powders the maximum-charge window runs from 1,693 fps to 2,680 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 87.0 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 | 87gr | Winchester Pointed 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.