Though nothing like that has happened to me -- I'd just inspect all the parts and the gun and -- if nothing looks chewed up, bent or broken; and if it all goes back together again; and the action still functions -- with the cylinder locking up just before the hammer drops, then it should be fine. These things are made out of good steel.
You might want to put some medium locktite on the screw.
Good luck and good shooting.
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