Quote Originally Posted by Heavyweight View Post
Gaijin....is this what primer "flow back" might look like? Zoom in on the primer. What's funny is that I haven't noticed this with any other ammo I've shot through the Prodigy....and it's been at least a half a dozen types.
Usually I associate that teardrop shaped bulge with an M&P, but I've also seen newer Glocks do that too.

This one is from an M&P:
M-n-P Brass.gif