Personally I have never experienced a torn, punctured or fractured primer ever to my knowledge but years ago when challenger first appeared I tried some and wasn't impressed. I found they had more recoil than the Gold Medals and my own reloads I was using at that time. For that reason I never bothered with them. Then by being around others who were using them and hanging out with my gunsmith buddy I started to see the problems some were experiencing with them so I avoided them. Last year I bought two flats of Kents. They shot superbly and the price point was excellent. I never experienced any issues but then I was told they run the cheddite primer as well so I haven't purchased any more. When I looked at SCORE for a target load, first for the price of them I'd rather throw another $15/flat on top and shoot a premium shell like Federal Gold Medals plus they are running cheddite primers as well or so I was informed so I'd sooner avoid a possible issue.
