I polished on the feed ramp and barrel before this last time out and still not thrilled. It seems I get some strikes about every magazine that won't fire. I'm also finding at times (more than I like), it will fail to extract the brass. I can drop the magazine on an un-fired light strike and it won't extract it. It's like it really needs to come forward some and for the extractor to go in behind the brass rim... but doesn't. When I went to try it on my Limited I found out the magazine won't clip in due to the magwell. Since my Ruger MIII eats everything, I don't think this thing should be finicky to one perfect ammo! Any suggestions?