Greetings fellow R51 enthusiasts.
It was a happy day today for me as I range popped my new R51 cherry and couldn't be more pleased.  I got a good one. A quick 100 rds of Federal 124gr American Eagle, Remington (green & white) 124gr and Remington Golden Saber 124gr ran without a snag or complaint. It was very accurate and pleasingly recoil manageable. The R51 even looks better in hand than in the advertising pictures...  I'm a fan now!