It seems like there is a part worn or broken inside, and dropping the hammer like that can mark up the cylinder and create addition problems there, also.
I don't know where you are at, but if you are in the FL panhandle area, PM me.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)