The 617 at the top of this picture only has about 3000 rounds through it. It's a real winner, and shoots as good or better than the other two K22's pictured from the 50's and 40's.

Ten-shots rule in .22! I only use standard velocity rounds in about 99% of my .22's, though. This 617 is very accurate; I keep wanting to put a red-dot on it but I'm afraid of ruining the balance. If the cylinder does ever have a problem, I'll just send it back for one made of steel.