I recently bought a new cylinder for my 1851 Navy .44 and when I installed it I notice that the timing may be off. On three of the six chambers, it feels as though the bolt isn't quite clearing the cylinder notch before the hand starts pushing up on the cylinder. It gives slight resistance, and then you can feel a slight "pop" as it frees itself and the cylinder rotates. I can also see a slight burr forming on the edges of these cylinder notches. Now, I'm no professional gunsmith, but if I had to take a stab at it, I'd say that maybe some of the engagement surfaces of the cylinder ratchets (not sure if my terminology is correct) need to be filed down a little? I realize that this may make matters worse, but that's why I'm wanting to check with all you out there who may know a thing or more. I hope I'm being as clear as I can with my description, but please let me know if I need to re-explain something a little better. Any input from you all would be much appreciated. Thanks.