I have a 5R in 300WM too, hasn't been fired by me at all, it's been thoroughly checked over and cleaned, which I bore scoped, everything looks mint.
I haven't even thought about mounting a scope, rings or bases on this thing yet. I have too many projects all at once. I was going to true up the LR and move it on, but it shoots so darn good.
I think I have too many 300WM rifles, 3 Kimbers a Classic a Select & Super America, 2 Wins an EW & Supergrade and 3 Rem 700's a Sendero II, a LR and the 5R.
I really like my Kimber Classic and Win EW for stalking, both are light.
Cheers.