I'm on the .243 Winny wagon as well. Being you do not reload and the type of shooting you're after, this is an easy one. Very common cartridge with many different bullet weights. . .you can find them from mild to wild! Get it in a 8 or 9 twist and it will stabilize the 100 gr. and up bullets to double as a very good deer pistol too. I'm a big fan of MGM, you won't go wrong with them in whatever caliber you choose. Good luck!