.25 caliber. If you mean chamberings: Souper Improved. Was building a very small .25 to use the 100 grain ballistic tip, but its bc is so poor, I had to switch at the last moment to 6mm. The problem is the throating. If you put a fast twist barrel on (in the hope that they may release a decent bc medium weight bullet in the near future) and throat for a current low bc bullet, it's going to be the wrong throat for if they ever release a high bc bullet in that weight.
Last edited by Riflehunter; 02/21/23.
