Load Specifications
Load data in caliber .25-35 Win. with .257 | 90gr | Reichenberg HDB Universal bullet and 19 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Alliant AR-Comp and Vihtavuori N135.
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% | 39,392 psi | 89% | 2546 fps | 97.7% |
| Accurate 2495ᴾ | <<locked>> | 100% | 38,305 psi | 87% | 2595 fps | 97.8% |
| Accurate LT-30 | <<locked>> | 82% | 38,145 psi | 86% | 2434 fps | 95.8% |
| ADI AR 2207 | <<locked>> | 82% | 39,813 psi | 90% | 2543 fps | 100% |
| Alliant AR-Comp | <<locked>> | 94% | 38,392 psi | 87% | 2612 fps | 99.5% |
| Alliant Reloder-10x | <<locked>> | 86% | 37,695 psi | 85% | 2530 fps | 98.3% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 38,609 psi | 87% | 2464 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,198 psi | 73% | 1673 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 39,233 psi | 89% | 2635 fps | 96.8% |
| IMR 4198 | <<locked>> | 86% | 39,508 psi | 89% | 2523 fps | 99.3% |
| Norma 200 | <<locked>> | 82% | 37,550 psi | 85% | 2510 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,097 psi | 73% | 1713 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 38,624 psi | 87% | 2536 fps | 96.7% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 39,334 psi | 89% | 2507 fps | 95.8% |
| Somchem S335 | <<locked>> | 94% | 39,305 psi | 89% | 2513 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 82% | 40,001 psi | 90% | 2507 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 38,580 psi | 87% | 2490 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 92% | 37,739 psi | 85% | 2484 fps | 97.1% |
| Vihtavuori N135 | <<locked>> | 98% | 37,898 psi | 86% | 2572 fps | 97.5% |
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 | <<locked>> | 86% | 32,518 psi | 74% | 2395 fps | 95.6% |
| Accurate 2495 | <<locked>> | 94% | 31,328 psi | 71% | 2441 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 35,737 psi | 81% | 2382 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 37,608 psi | 85% | 2500 fps | 100% |
| Alliant AR-Comp | 23 gr | 82% | 26,571 psi | 60% | 2303 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 31,415 psi | 71% | 2382 fps | 96.5% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 36,289 psi | 82% | 2415 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,525 psi | 53% | 1490 fps | 100% |
| IMR 3031 | 25.8 gr | 92% | 34,693 psi | 78% | 2530 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 33,359 psi | 75% | 2388 fps | 98% |
| Norma 200 | <<locked>> | 80% | 35,520 psi | 80% | 2464 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,598 psi | 53% | 1529 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 34,069 psi | 77% | 2434 fps | 95.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 37,217 psi | 84% | 2461 fps | 95.1% |
| Somchem S335 | <<locked>> | 92% | 37,231 psi | 84% | 2470 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 37,710 psi | 85% | 2464 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 30,182 psi | 68% | 2300 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 86% | 31,691 psi | 72% | 2346 fps | 95% |
| Vihtavuori N135 | 25.2 gr | 92% | 31,256 psi | 71% | 2418 fps | 95.2% |
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 42 powders for .25-35 Win. loaded with the .257 | 90gr | Reichenberg HDB Universal. IMR 3031 delivers the highest muzzle velocity at 2,635 fps; across all powders the maximum-charge window runs from 1,673 fps to 2,635 fps. Accurate 2495 gives the best case fill at 100 %, and 42 of the 42 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 73–90 %, 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, Accurate 4064, Hodgdon TrailBoss 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 3031, Alliant AR-Comp, Vihtavuori N135 rank at the top here: for .25-35 Win. with the .257 | 90gr | Reichenberg HDB Universal they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2460, Accurate 2520, Accurate 4064 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.