My colt had some premature lock backs (2 out of 438 rounds) and I saw some copper marks on the slide stop so I took out the file and...
So now with the mag partially in to show the closest the round will come to touching it.
Did I remove too much? I was thinking that only the bottom part of it which engages the follower and the top part is important, but I'm not an expert so...
What say you?
Thanks!

So now with the mag partially in to show the closest the round will come to touching it.

Did I remove too much? I was thinking that only the bottom part of it which engages the follower and the top part is important, but I'm not an expert so...
What say you?
Thanks!