One also has to make sure bbl is original to the gun. I have seen 2 3/4" marked bbls on older frames not modified for the longer shell. When I was doing some smithing a gentleman brought one in for me to look at, he had on "Trial" but wasn't ejecting. The bbl had been moved forward, shiny ring showing forward of receiver, but port unopened & no other mods done. I showed him what it was & what would need to be done to make it right & he decided to "Hunt" for another one. This one also had the safety in front of trigger guard.
