I would always suggest of having a couple extra shells on you for trap skeet or any clays sport, i have had factory misfires before, it can be a few different things, others like missing anvil in the primer from factory, or in my reloads ive loaded up a spent primer once or twice and went wtf? Ive had best luck with remington 12ga gun clubs, or winchester, also they are best to reload if you ever do, walmart specials of 100 are cheap, and those are the ones ive had issues with in the past, also the winchester 12ga super target is junk, metal on the shell is thin, expands and every so often you get a jam in the chamber. And any misfires, i wait the 30 sec, load it back in and try it again, some just light strike and go off the second time.