24 published .257 Roberts Ackley Improved (P.O. Ackley Data) reloading recipes across 6 powders, with bullet weights from 60 to 125 grains and recorded velocities between 2,570 and 3,960 fps. Every load lists charge weight, velocity, COAL, primer and case where the source published it.
The first 5 of 24 recipes.
| Bullet | Powder | Charge | Velocity | COAL | Primer |
|---|---|---|---|---|---|
| 100gr | Hodgdon H-380 | 42.0 gr | 2862 fps | — | — |
| 100gr | IMR IMR-3031 | 43.0 gr | 3165 fps | — | — |
| 100gr | IMR IMR-4064 | 44.0 gr | 3088 fps | — | — |
| 100gr | IMR IMR-4064 | 46.0 gr | 3165 fps | — | — |
| 100gr | IMR IMR-4320 | 47.0 gr | 3322 fps | — | — |
We'll email you a one-tap sign-in link. No password required.
Already have an account? Sign in
Open the full search to narrow .257 Roberts Ackley Improved (P.O. Ackley Data) data by bullet weight, powder manufacturer, powder and bullet make.
Search all 24 .257 Roberts Ackley Improved (P.O. Ackley Data) loads