Aberhan
Beginner
- Jun 25, 2026
- 4
- 3
Hello and thanks for letting me join this forum. My first question concerns the 257 Roberts. I would like to compare the case capacity of the 257 Roberts with the 257 Roberts AI and the 25 Creedmoor. I haven’t had much luck find ing a source for this information and the sources I have found have conflicting numbers. The numbers I have are 25 Creedmoor- 53 grains of water, the 257 Roberts-51.4 grains of water and the 257Roberts AI 54-60 grains, which I highly doubt. Can anyone steer me to an accurate source? I need this information to extrapolate loading data, thank you.
