You can see where they got hung up in these pictures. Looks like when they stamped/machined the small chamfers on each side they ended up more straight instead of following the normal curve of the barrel. Seems like it's just enough that the brass catches sometimes depending on how much side...
Picked up a new Shockwave back in June and finally got a chance to take it to the range yesterday. Only put 20 rounds through it, but of those, 2 failed to feed and upon inspection they showed a strip of brass that got peeled back when being racked into the barrel (see pics). Both were...