Re: My 300RUM by MCR
Burris signature rings with inserts are SWEET! Trebark and i both have them on all of our rifles... never leave any ring marks, no lapping, and we can set just the right cant for the specific scope. Either 5, 10, 15, 20, or 30 moa as we see fit. Never had a problem with them holding zero or anything either, just make sure to de-grease them COMPLETELY before installing, as i imagine that may lead to slippage.
"Out of range" is a theoretical concept as far as I'm concerned. Send it!