I have a NIB Colt 1860 Army 2nd gen. I just installed new SlixShot nipples that I purchased from Long Hunter out of Texas. Got the correct thread type and all of that. Installed just fine. The problem is...now the cylinder turns REAL hard/stiff? I do not see any obvious areas where the nipples are rubbing or dragging against the frame, but when I pull the hammer back and the cylinder rotates the whole process is VERY,VERY stiff to include pulling the hammer back? I am stumped? It was not this way prior to the new nipples? Any advise?