Load Specifications
Load data in caliber .25-35 Win. with .257 | 70gr | CutEdge ESP Raptor bullet and 12 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 4198, ReloadSwiss RS 14 and Hodgdon TrailBoss.
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 |
|---|---|---|---|---|---|---|
| ADI AR 2207 | <<locked>> | 86% | 37,434 psi | 85% | 2844 fps | 99.1% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 38,580 psi | 87% | 2936 fps | 97.4% |
| Alliant Reloder-10x | <<locked>> | 94% | 39,682 psi | 90% | 2907 fps | 96.5% |
| Alliant Reloder-7 | <<locked>> | 86% | 39,073 psi | 88% | 2831 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 30,429 psi | 69% | 1900 fps | 100% |
| IMR 4198 | <<locked>> | 90% | 37,927 psi | 86% | 2818 fps | 96.9% |
| Lovex S053 | <<locked>> | 82% | 39,726 psi | 90% | 2802 fps | 100% |
| Norma 200 | <<locked>> | 90% | 39,508 psi | 89% | 2890 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 29,979 psi | 68% | 1942 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 39,160 psi | 89% | 2661 fps | 100% |
| Vihtavuori N120 | <<locked>> | 86% | 37,652 psi | 85% | 2812 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 94% | 38,696 psi | 87% | 2818 fps | 95.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2207 | <<locked>> | 80% | 30,777 psi | 70% | 2674 fps | 97.4% |
| Alliant AR-Comp | <<locked>> | 96% | 33,823 psi | 76% | 2812 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 92% | 37,130 psi | 84% | 2848 fps | 95.7% |
| Alliant Reloder-7 | <<locked>> | 82% | 34,664 psi | 78% | 2726 fps | 95.4% |
| Hodgdon TrailBoss | 8.2 gr | 80% | 22,002 psi | 50% | 1693 fps | 100% |
| IMR 4198 | 23.5 gr | 86% | 33,692 psi | 76% | 2710 fps | 95.4% |
| Lovex S053 | <<locked>> | 80% | 37,652 psi | 85% | 2756 fps | 99.9% |
| Norma 200 | <<locked>> | 86% | 34,606 psi | 78% | 2776 fps | 95.7% |
| ReloadSwiss RS 14 | 8.4 gr | 80% | 21,799 psi | 49% | 1736 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 34,998 psi | 79% | 2579 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 31,067 psi | 70% | 2654 fps | 98.6% |
| Vihtavuori N130 | <<locked>> | 92% | 36,245 psi | 82% | 2759 fps | 95% |
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 .25-35 Win. loaded with the .257 | 70gr | CutEdge ESP Raptor. Alliant AR-Comp delivers the highest muzzle velocity at 2,936 fps; across all powders the maximum-charge window runs from 1,900 fps to 2,936 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 (305 MPa), the top charges use 68–90 %, leaving at least 10 % headroom. The 70.0 gr projectile in 0.257" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. 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. IMR 4198, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for .25-35 Win. with the .257 | 70gr | CutEdge ESP Raptor 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.