Load Specifications
Load data in caliber .25 ACP with .251 | 50gr | Speer Hollow Point Gold Dot bullet and 19 powders. The key underlying parameters are shown in the table above.
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 ≥ 60% and propellant combustion ≥ 80%. 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: 2.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate Solo 1000*² | <<locked>> | 68% | 13,982 psi | 80% | 732 fps | 90.7% |
| ADI APS 450² | <<locked>> | 68% | 15,171 psi | 87% | 732 fps | 99.9% |
| ADI AS 30² | <<locked>> | 72% | 15,171 psi | 87% | 764 fps | 97.1% |
| ADI AS 50N*² | <<locked>> | 72% | 14,750 psi | 85% | 764 fps | 90.6% |
| Alliant Green Dot*² | <<locked>> | 76% | 14,620 psi | 84% | 761 fps | 90.6% |
| Alliant RED DOT² | <<locked>> | 76% | 14,852 psi | 85% | 771 fps | 96.1% |
| Baschieri & Pellagri 100*² | <<locked>> | 76% | 14,011 psi | 81% | 741 fps | 87.6% |
| Baschieri & Pellagri 102 Pistol*ᴾ | <<locked>> | 100% | 13,706 psi | 79% | 768 fps | 89.6% |
| Baschieri & Pellagri 103 Pistol*² | <<locked>> | 76% | 14,040 psi | 81% | 771 fps | 88.5% |
| Hodgdon Clays² | <<locked>> | 72% | 14,257 psi | 82% | 715 fps | 99.5% |
| Maxam CSB 2* | <<locked>> | 92% | 14,127 psi | 81% | 814 fps | 88.7% |
| Maxam CSB 4*² | <<locked>> | 72% | 14,098 psi | 81% | 758 fps | 91.4% |
| Maxam CSB 5² | <<locked>> | 72% | 14,750 psi | 85% | 768 fps | 98.7% |
| ReloadSwiss RS 12*² | <<locked>> | 76% | 13,808 psi | 79% | 810 fps | 91.8% |
| Rottweil P 801² | <<locked>> | 68% | 14,025 psi | 81% | 791 fps | 95.1% |
| SNPE Vectan A1*² | <<locked>> | 76% | 15,432 psi | 89% | 774 fps | 85.9% |
| SNPE Vectan BA10² | <<locked>> | 64% | 15,156 psi | 87% | 732 fps | 99.9% |
| Vihtavuori N320*² | <<locked>> | 76% | 13,822 psi | 79% | 771 fps | 91.1% |
| Vihtavuori N32C Tin Star*ᴾ | <<locked>> | 100% | 10,109 psi | 58% | 679 fps | 94.7% |
Start Load - Barrel Length: 2.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate Solo 1000*² | <<locked>> | 60% | 11,908 psi | 68% | 679 fps | 87.8% |
| ADI APS 450² | <<locked>> | 60% | 12,763 psi | 73% | 682 fps | 99% |
| ADI AS 30*² | <<locked>> | 60% | 10,907 psi | 63% | 659 fps | 92.4% |
| ADI AS 50N*² | <<locked>> | 64% | 12,734 psi | 73% | 715 fps | 87.9% |
| Alliant Green Dot*² | <<locked>> | 68% | 12,618 psi | 73% | 715 fps | 87.8% |
| Alliant RED DOT*² | <<locked>> | 60% | 10,602 psi | 61% | 666 fps | 90.9% |
| Baschieri & Pellagri 100*² | <<locked>> | 72% | 14,011 psi | 81% | 741 fps | 87.6% |
| Baschieri & Pellagri 102 Pistol* | <<locked>> | 92% | 12,024 psi | 69% | 728 fps | 87% |
| Baschieri & Pellagri 103 Pistol*² | <<locked>> | 72% | 12,517 psi | 72% | 738 fps | 86.3% |
| Hodgdon Clays² | <<locked>> | 60% | 9,979 psi | 57% | 614 fps | 96.3% |
| Maxam CSB 2* | <<locked>> | 84% | 12,270 psi | 71% | 768 fps | 85.7% |
| Maxam CSB 4*² | <<locked>> | 60% | 10,196 psi | 59% | 656 fps | 85.1% |
| Maxam CSB 5² | <<locked>> | 60% | 12,372 psi | 71% | 715 fps | 96.9% |
| ReloadSwiss RS 12*² | <<locked>> | 64% | 10,211 psi | 59% | 715 fps | 85.7% |
| Rottweil P 801*² | <<locked>> | 60% | 10,356 psi | 60% | 699 fps | 89.9% |
| SNPE Vectan A1*² | <<locked>> | 72% | 15,432 psi | 89% | 774 fps | 85.9% |
| SNPE Vectan BA10² | <<locked>> | 60% | 15,156 psi | 87% | 732 fps | 99.9% |
| Vihtavuori N320*² | <<locked>> | 68% | 11,806 psi | 68% | 722 fps | 88% |
| Vihtavuori N32C Tin Star*² | <<locked>> | 72% | 6,469 psi | 37% | 554 fps | 85.5% |
* not dangerous but load has suboptimal powder burnt with possible characteristics such as extensive muzzle flash or inaccurate loads.
² fill rate low - you might want to consider using a filler to ensure proper ignition.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 19 powders for .25 ACP loaded with the .251 | 50gr | Speer Hollow Point Gold Dot. Maxam CSB 2 delivers the highest muzzle velocity at 814 fps; across all powders the maximum-charge window runs from 679 fps to 814 fps. Baschieri & Pellagri 102 Pistol gives the best case fill at 100 %, and 3 of the 19 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (120 MPa), the top charges use 58–89 %, leaving at least 11 % headroom. Baschieri & Pellagri 102 Pistol, Vihtavuori N32C Tin Star 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. As outliers, Accurate Solo 1000, ADI AS 50N, Alliant Green Dot burn incompletely and react more sensitively to barrel length and temperature. Accurate Solo 1000, ADI APS 450, ADI AS 30 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.