I have one of these I opened up to fit a magnum contour A&B 338-06 barrel. I had to remove enough material to free float it that I busted through the fiber glass in two places, about halfway between the recoil lug and front end. Right now I'm looking into the best way to refinish the barrel channel. I was going to take just a little more off then fill the fore end holes with expanding insulation then JB Weld over the top. Finish sand, paint, then call it good. I'm wondering if there is a better topper than JB Weld for doing this but don't have much experience in stock work.