The rifle I am asking about is a Remington 700 SPS Varmint... I am relatively new to this, my plan was to drop my rifle off to the gunsmith and have him shorten the factory barrel (only has 200rnds through it, and shoots extremely accurate) from 26" to 24" and have it fluted, trying to shave some weight off the rifle, plus it feels really front heavy to me right now. My question is can the 243 chamber be cut so that its a 243AI? I was looking at ballistics and I think it would be cool to make it an AI (I only have 1 rifle, used for pigs, coyotes and deer)... The other question is that can I use my 243 cases and just reform them?