Hello Guys, I have a CZ 550 in .243 Win. and the barrel is close to the end of its life. Thinking about turning it into 243ai. Just wondering if anyone has built one on this action before or has any advice. I am also thinking about building an 8 twist .22-.243(already have all the parts).For 80 gr Bergers. Either one will primarily be for coyotes waaaay out there.Not for fur. Any suggestions or comments?