Used and once fired brass requires many steps to get it ready to reload. The prep involved in primer pockets is extremely important. Primer pocket cleaning and uniforming are the basics, but other brass can pose many other issues. Military surplus brass and Lake City Brass will have crimp around the primer pocket that needs removed either by swaging or reaming. Midsouth Shooters carries primer pocket prep tools and other reloading case prep tools from major reloading brands like Forster, RCBS, Hornady, Lee Reloading, Lyman