I know that there is a lot of debate on shooting centerfire lead rounds out of polygonal rifled barrels like the stock Glock barrels. But how about rimfire lead rounds? I was looking at my Advantage Arms 17-22 LE kit for my G17 and I noticed that it had polygonal rifling. Wouldn't the same principles of shooting lead apply to rimfire? The .22lr range form 1000-1250fps. I have some Eley Sport and Federal Automatch which are all lead bullets and am wondering if I should worry about leading and excessive pressures. The Federal Automatch is recommended by Advantage Arms so that is why I am posting the question up here. I tend to shoot off more .22lr rounds than 9mm rounds during a session, so I want to know if I should worry about cleaning at the range. Wanna kill these ads? We can help!