Two of the ratchets are wider than the rest. On these 2, the hand is binding between the ratchet and the frame at the end of the trigger pull. They will wear in over time with enough use, or can be filed to fit.

Filing ratchets is not for the inexperienced. It takes a skilled and practiced hand. There is a very fine line between not enough and too much. A good revo smith can do it in a few minutes. A poor one can ruin it in a few minutes.