49 published .257 Roberts Improved (RCBS Version) reloading recipes across 11 powders and 4 bullet manufacturers, with bullet weights from 75 to 120 grains and recorded velocities between 2,728 and 3,419 fps. Every load lists charge weight, velocity, COAL, primer and case where the source published it.
The first 5 of 49 recipes.
| Bullet | Powder | Charge | Velocity | COAL | Primer |
|---|---|---|---|---|---|
| Sierra spitzer 100gr | Hodgdon H-4350 | 51.0 gr | 2,944 fps | — | — |
| Hornady SP 100gr | Hodgdon H-4831 | 53.0 gr | 3,015 fps | — | — |
| Speer HP 100gr | Hodgdon H-4831 | 53.0 gr | 3,081 fps | — | — |
| Nosler SB 100gr | Hodgdon H-4831 | 54.0 gr | 3,097 fps | — | — |
| Nosler Partition 100gr | Hodgdon H-4831 | 52.0 gr | 2,906 fps | — | — |
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Search all 49 .257 Roberts Improved (RCBS Version) loads