Re: muzzle breaks
While a 243 weighing anything over 8lb won't recoil real noticably really, a muscle brake sounds like the right deal. While a lot of people dislike recoil, wait till they get some backblast from a muzzle brake. The CSR muscle brake is the mildest in that aspect.
"Out of range" is a theoretical concept as far as I'm concerned. Send it!