I was given a bucket of Winchester 38+P nickel plated brass a while ago, once fired, off a law enforcement range. Started sizing & decapping it, and a lot of the primers will not punch out. The primer punch punches out the bottom of the primer, leaving the sides of the primer in the pocket. The resulting burr protruding on the cartridge base makes removing the shell almost impossible to remove from the shell holder. I have to use small hammer & a flat punch on the side of the shell to remove it from the shell holder. This happens on probably 20% of the shells. I've never encountered this problem on such a large scale in 60 years of reloading. This stuff would play hell on a progressive press, & really foul it up. No other make of brass has ever given me such grief.
Anybody else encounter this problem?