Hello, Last year I acquired an old Remington Model 721 in 270 and am uncertain of round count. (Rifle appears in very good condition.) To my disappointment I have had several misfires with this rifle. I eject the round and notice there is still a healthy dent in the primer so I am miffed about my problem. The Winchester primers I use have never given me any grief in the past so am leaning towards a gun problem. Could it just be my firing pin or a problem with one of the springs? Any help would be greatly appreciated. I really like the rifle and want to use it for hunting but right now just don't have any confidence in it. Thanks in advance.