... and that gap (which is technically called the "gauge") is what may be causing a problem for me. I bought a brand spankin' new King Cobra in May. On the first range trip it was binding up in double action, although I could overcome the binding by manually cocking the hammer. I measured the gap at a tight .0015". That is EXTREMELY tight, as you guys know. I called Colt and they said to send it back. Fast forward, the revolver comes back to me. For grins I measured the gap. It measured .002", which is ALSO extremely tight, but the gun felt outstanding. Took it to the range and it made it through 24 rounds before starting to bind up. I'm not sure the gap caused the problem, but the gun is back at Colt as I type this. That brings me to the point that... these guns are likely very tight in all aspects, as they're CNC machined, with less hands-on assembly and finishing. I would guess there's going to be teething problems when new models come out. Anyway, that's my story and I'm stickin' with it. I think the gaps the OP posted are just about right. A former Colt gunsmith (from the 90s) told me that Colt cylinder gaps should be on the order of .004"-.006", but that was with older guns, so I don't know how it translates to today's precision.