Hello, I'm a pretty happy owner to a .454 Ruger Super Redhawk. It is actually my first revolver. After firing it for the first time I noticed a discoloring on the front of the cylinder. I tried wiping it of using a piece of cloth but it didn't help. I asked a friend at work who has a lot more experience with revolvers than me and he said there isn't much you can do about it and it's normal. So I didn't think more of it. However, during shooting sessions, sometimes while cocking the revolver, the cylinder wouldn't cycle. The behavour wasn't consistent. It just happened every once in a while. The last time it happened was at home while dry-firing. I couldn't think of anything else so I finally went at the residue with a brass brush and got almost all of it off. And it didn't happen any more. I haven't fired the gun since. Does it make sense that the gun powder residue on the cylinder front could prevent cycling? Thanks for any input!