I was scrounging at the local shooting range and picked up a small pile of Federal NT .45 acp brass. I didn't notice anything unusual until I tried to reload it and the primer wouldn't seat. So, a little investigation leads me to believe that this is small pistol primer only. Am I correct? Should I throw this out or can I load it safely using my standard load of 5.4 grains Win 231/HP-38 and 200 LSWC? Or do I need to work up a new load? Not really interested in te latter and I certainly have enough brass to last me.