Have you guys that shoot guns over 3000fps ever tried it. An old timer turned me onto it. Claims it is the only stuff he's tried that will take the brass out of your riflings. I took my 7mm down there a couple weeks ago and I had just cleaned my gun. Well it was a pretty ugly sight seeing all that stuff come out that i thought I'd already gotten out. He said that with guns shooting faster than 3000fps you'll need to remove that brass buildup more often. Plugs up the riflings and reduces accuracy.