I have a savage 10 fp hs that has 3812 rounds through it and it will shoot 5 in 0.5" at 200 if I don't screw it up. I know it isn't typical, but I have only used KG products and nylon brushes and for the first 2,000 rounds I took care of the barrel pretty good. Each range trip I'm waiting for something bad to show up, but I'm still waiting. I even developed a load with an ES of 4 just some two hundred shots ago, so it's not like "well it's still shooting" kind of thing. It's still shooting good.