Update on my earlier post:The spring and roller pin arrived from Dixie Gun Works last week and I installed the new parts today.First Problem:The spring from Dixie was different from the Lyman spring(The Dixie spring had a groove for the hammer roller that the Lyman spring did not.The hammer fall was weaker than the original Lyman spring!So I took off the Dixie spring and re-installed the Lyman spring along with the new Dixie hammer roller pin.I noticed that the old slightly bent roller pin was only a piece of wire and not a correctly hardened roller pin!Guess what?The revolver works perfectly now and did not need a new main spring!Oh well, live and learn ,at least the Dixie main spring only cost 3 bucks!The two springs differed in design and I suspect that the Lyman Revolver may have been produced by Uberti or some other Italian maker and not Pietta.