If the cylinder is not carrying up properly, it likely due to either the ratchets on the extractor not being cut properly or the hand. I'm assuming that the extractor may have been replaced rather than swapping the old one over from the previous cylinder.
Did you happen to notice if the cylinder was not carrying up on a specific chamber each time or was it occurring at random?
Didn’t pay that much attention to it but now that you bring it up, it seems it was every 4th pull.
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