As another post said, the chamber in that 243AI needs to be checked for headspace, as some gun mechanics would just run an Ackley reamer in without setting the barrel back to achieve correct (tighter) Ackley headspacing, at least with rimless case rounds. I’ve had a few Ackley rifles and enjoyed tinkering with them. It helped to have my own machinery (lathe). I have kept a favorite- Shilen barrel 250 AI, a favorite of mine.
