Thanks Guys for the info.I have 4000+ rounds down the barrel,it served me well for a stock barrel. At 100 yards it shot a one hole group 3 rounds, I stopped shooting at that target, it looked so good. Average is 1/4-1/2 100 yards at 200 1/2 - 3/4. my set up on the weapon is jewell trigger 10oz., McArther muzzle brake , Iron Brigade armory one piece mount & lapped rings 1'',Bushnell 4200 Elite 6x24x40 Multi-plex Scope,the rest is all Remington.When I change the barrel from stock to match heavy barrel, I'm troubled about stock to barrel fit. I hear GA Precision & Iron Brigade Armory are both very good.This weapon has served me well and when it comes time to brake it up,I just want it to shoot as well if not better before my eyes go. I'm a 65 year old VN vet. and love to target. So I guess what I'm asking when I change the barrel will it screw up things.