Not once. I have shot over 2 cases of them in my 12 and 20 and have yet to have one hang up or anything except expell death!!! i shoot them in SX2's, SBE, and Brownings without a hitch.
Try them again and see if it happens again in a controlled experiment. Make sure they are clean of any debris, fire them and see what happens. If it does, look at the shell and see if you can see why. Make sure your chamber area is clean, rust, dirt, etc.. Let us know back.