I know that this is quite a open question, but I am looking for suggestions. I recently obtained a 223 pss for a song and dance, and would like to rechamber it to something that shoots a little flatter. I was thinking about a 22-250 improved, and maintain the fast twist so I could use the heavy bullets. I do reload, but would prefer to have the ability to shoot factory ammo in the gun on occation. Am I on a good path, or does someone have a better caliber choice for the short action.