Yeah a 243 would be near perfect. How about a 6mm Remington in factory or AI configuration? Is there enough mag box in the MRC to seat the 105gr.+ VLD's to a good OAL?
I've not messed with the 6mm Rem except for a Ruger M77 with 100gr. cup and core spitzers. I do know that it appealed to me as a teeny bit better than the 243. Maybe. But that's the fun of it all ain't it?
Mark
NRA Life Member Anytime anyone kicks cancers azz is a good day!