Is he talking 66 two inch, or 66 dash 2 mod level? I have a 66 mod 3 and it has no problems whatsoever. Only thing to check is if it has been heavily fired with alot of hot magnum ammo, causing looseness or excessive wear in the gun. But the info in the used rev. buying posting in the rev. forum should tell you about that. If it is a tight gun, just be aware of the fact it is a K frame and may not take the constant beating of magnum loads as well as a larger frame, but still should last and last. Last hundreds of years if not abused!