I got a couple boxes of these the other day. I tried to pattern them in my stoeger m2000. The firing pin did not strike the primer hard enough to discharge it. I thought there was something wrong with the gun. What I figured out was the brass on some of the shells were tapered and not letting the action close completely. This was on about 2 out of 5 in the box. Anyone else had a similar problem? The gun shoots everything else perfect.