David,
No experience with the RPR... but I am with Greg that if for hunting it would not work for me.
CDI Precision has DBM for the Ruger American (AICS mag.s) $150, and they will inlet your factory stock for it at no additional charge. (note that the cost of their DBM is about $20 more than PTG's)
Something else to think about; I had a RAPredator in 6.5 Creed and the chamber was so much larger than my Fieldcraft that once fired brass would not fit the Barrett (after FULL length sizing). Yes, I probably could have sent my sizer die back to Hornady, but I traded the rifle off instead.
Jerry
http://www.cdiprecisiongunworksstore.com/ruger-american-short-action-factory-stock-dbm/
