Load Specifications
Load data in caliber .25-35 Win. with .257 | 90gr | Hammer Absolute Hammer bullet and 18 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% | 39,363 psi | 89% | 2546 fps | 97.6% |
| Accurate 2495ᴾ | <<locked>> | 100% | 35,215 psi | 80% | 2533 fps | 96.8% |
| Accurate LT-30 | <<locked>> | 84% | 38,870 psi | 88% | 2444 fps | 95.9% |
| ADI AR 2207 | <<locked>> | 82% | 37,884 psi | 86% | 2503 fps | 100% |
| Alliant AR-Comp | <<locked>> | 96% | 38,609 psi | 87% | 2615 fps | 99.4% |
| Alliant Reloder-10x | <<locked>> | 88% | 38,014 psi | 86% | 2536 fps | 98.3% |
| Alliant Reloder-7 | <<locked>> | 82% | 39,117 psi | 88% | 2497 fps | 98.8% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 38,986 psi | 88% | 2470 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,343 psi | 71% | 1654 fps | 100% |
| IMR 3031 | <<locked>> | 98% | 39,494 psi | 89% | 2638 fps | 96.6% |
| IMR 4198 | <<locked>> | 86% | 37,927 psi | 86% | 2487 fps | 98.9% |
| Norma 200 | <<locked>> | 84% | 37,550 psi | 85% | 2510 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,154 psi | 70% | 1690 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 38,783 psi | 88% | 2536 fps | 96.6% |
| Vihtavuori N120 | <<locked>> | 82% | 38,116 psi | 86% | 2474 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 38,653 psi | 87% | 2490 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 94% | 37,971 psi | 86% | 2484 fps | 97% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 37,579 psi | 85% | 2562 fps | 97.3% |
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 | 23.8 gr | 88% | 32,503 psi | 73% | 2398 fps | 95.4% |
| Accurate 2495 | <<locked>> | 96% | 30,589 psi | 69% | 2425 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 82% | 36,303 psi | 82% | 2392 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 35,244 psi | 80% | 2451 fps | 99.8% |
| Alliant AR-Comp | 23 gr | 84% | 26,556 psi | 60% | 2303 fps | 95.3% |
| Alliant Reloder-10x | 21.3 gr | 80% | 29,182 psi | 66% | 2326 fps | 95.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 36,941 psi | 84% | 2454 fps | 98.4% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 36,579 psi | 83% | 2418 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,945 psi | 52% | 1473 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 36,840 psi | 83% | 2579 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 31,792 psi | 72% | 2349 fps | 97.4% |
| Norma 200 | <<locked>> | 80% | 32,967 psi | 75% | 2411 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,931 psi | 52% | 1512 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 34,026 psi | 77% | 2431 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 35,447 psi | 80% | 2421 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 30,211 psi | 68% | 2300 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 90% | 33,475 psi | 76% | 2388 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 96% | 32,967 psi | 75% | 2457 fps | 95.7% |
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 18 powders for .25-35 Win. loaded with the .257 | 90gr | Hammer Absolute Hammer. IMR 3031 delivers the highest muzzle velocity at 2,638 fps; across all powders the maximum-charge window runs from 1,654 fps to 2,638 fps. Accurate 2495 gives the best case fill at 100 %, and 18 of the 18 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 70–89 %, leaving at least 11 % headroom. The 90.0 gr projectile in 0.257" calls for a 1:10.0 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, Alliant Reloder-10x, Accurate 2015 rank at the top here: for .25-35 Win. with the .257 | 90gr | Hammer Absolute Hammer 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.