I ruined my brother's 514 by shooting shorts in it and eroding the chamber, but I shot a lot of them. The extractor is a weak part of the design and mine failed to extract, after about a gazillion rounds.
People are like rifles. Some are tried and true, having great eyes, personality, and fun to be with. Others never seem to hit the mark with you. Still others go off half-cocked. Still, it's nice to know most of them.