Is this normal for my cobra?
I have a '74 cobra that does something,I think is a bit strange but I'm not sure. When I dry fire the gun the cylinder move very ever so slightly and I mean barely forward towards the forcing cone,after i release the trigger the cylinder moves ever so slightly back. Now this gun was just checked out by frank glenn of accuracy unlimited in AZ,frank said all was well with the gun and that he examined it thoroughly.
Now my question is that is this in fact normal? My 1952 cobra doesn't do this far as I can tell. However 've shot this gun and it functions and shoots great doesn't spit any lead or anything either. Also if I pull or push on the crane while its open its rock solid and doesn't move at all. I know there is a little spring and a plunger under the crane retaining screw that holds the crane inside the frame could there be and issue with this spring needing to be replaced? Thanks guys for any help with this.