I didn't do it on purpose - I had previously been shooting mag ammo with the mag cylinder and neglected to change back to the LR cylinder, when I was done. Some time later, I was shooting LR in it and realised my oversight, when the accuracy had gone for a crap. - didn't split the cases. My comment about timing, was not specifically for this swap - I had shot another guys revolver and noticed that there was a bit of splatter coming from it and was subsequently told, that he had installed a cylinder from a different gun (same make and model). I just figured that the timing might not be spot on - my opinion, only.