Sure Shot's claim:
. . . . I can't remember ever having the ability of chambering someone else's first fired brass directly into the chamber of my rifle and not have its bolt lock up without difficulty. EVER!!
I've done it several times with different barrels.
US Navy Distinguished Marksman Badge 153
Former US Navy & Palma Rifle Team Member
NRA High Power Master & Long Range High Master
NRA Smallbore Prone Master