RE: 243 Win. vs. 243 AI
LOL Forgive me for posting this and I dont know if anyone suggested it but why not just re-chamber for a 6mm? You would get as much or maybe a little more of a boost and then if ya wanted an ai still u could just do the 6mm ai and be way ahead...
I think most of the 6mm's were built on a short action werent they?