Quote Originally Posted by scosgt View Post
My CM40 shows some nicks on the feed ramp, not just on the edges. I polish it, it is pretty smooth but you can see the dings, probably from TMJ ammo banging into it?
If the metal of the barrel was of such poor quality, that gilding metal jackets were dinging it... I serously suspect that it would not work as a barrel for long.

Question - What takes more abuse, the feed ramp or the rifling?

The plating is coming off the ramp on my PM9, it looks like little dings and such but also has a crater or two... doesn't matter, doesn't effect performance,