I was concerned to notice that 3 of the 10 Remington primers had been perforated because of the firing pin. Not one of the other brands were being. Again to the problem. The Federal primers use another priming compound than CCI and Winchester. It really is my understanding this priming https://winchester-250-magnum-pri56789.dbblog.net/5192952/federal-215-large-magnum-primers-fundamentals-explained