I said in an earlier post my bullets didn't ding but I just let the slide slam on this one two times and it set the bullet back .006 so it has to be hitting and looking close I can see a small dent on the end and a slightest place on the mouth of the brass where it chambered. I am going to call this normal. I run a #14 or #15 spring with a 200 grain boolit and a mid range load. If you have a heavy recoil spring a softer spring may make your problem better. Here is a photo of the Mec gar magazine with the crimp I like.