391 published .257 Roberts (using Sierra bullets) reloading recipes across 21 powders and 1 bullet manufacturers, with bullet weights from 75 to 120 grains and recorded velocities between 2,029 and 3,443 fps. Every load lists charge weight, velocity, COAL, primer and case where the source published it.
The first 5 of 391 recipes.
| Bullet | Powder | Charge | Velocity | COAL | Primer |
|---|---|---|---|---|---|
| Sierra SPT, SBT or HPBT MatchKing 100gr | Accurate AAC-2700 | 40.0 gr | 2780 fps | 2.775 | — |
| Sierra SPT, SBT or HPBT MatchKing 100gr | Accurate AAC-2700 | 41.5 gr | 2884 fps | 2.775 | — |
| Sierra SPT, SBT or HPBT MatchKing 100gr | Accurate AAC-2700 | 43.0 gr | 2981 fps | 2.775 | — |
| Sierra SPT, SBT or HPBT MatchKing 100gr | Accurate AAC-2700 | 36.9 gr | 2587 fps | 2.775 | — |
| Sierra SPT, SBT or HPBT MatchKing 100gr | Accurate AAC-2700 | 38.4 gr | 2676 fps | 2.775 | — |
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Search all 391 .257 Roberts (using Sierra bullets) loads