This is my first time communicating on this forum. The question I have is concerning cylinder end play. I have a model 67 S&W, I believe 1973 manufacture date. I bought this revolver used. With hammer cocked, trigger pulled back and hammer released I have 0.004 tight clearance. But in this position I can push hard on the cylinder rearward and get 0.006 clearance. Which method is correct for checking end play of the cylinder? Thanks for your consideration.