It's been 5 years since I installed an 18" ER Shaw match barrel onto my RPRF and it was an immediate improvement and has shot well ever since (a little less than 2000 rounds through it, so far). I don't think you'll be disappointed.Thinking of rebarreling my ruger rprr wondering what the hive has to say about experince with E R Shaw 18 inch Match barrel. Thanks for all come backs