I have a borrowed Smith & Wesson in40 S&W here that I've been shooting a little. Not much though. It's model #4043. Every time I go to the range I pick up whatever shells I can, so I don't know who's shells I'm picking up. Some of the shells I've picked have been bulged near the head to the point the when I try to resize them that a slice gets cut off the brass. My Speer #13 manual says that some guns don't fully support the shell.
How can I tell if this auto pistol is one that doesn't support the brass properly?
What can be done about it?
I THINK this is one of the problem ones.