Because doubling or “going auto” happens when the sear slips off the hammer, because of issues with either the sear nose or the hammer hooks. The set screw on the Cajun adj hammer is nowhere near the action in this respect. If the screw moved all that would happen would be that the safety either couldn’t be engaged or would fail to block the sear (depending on which way the screw moved). Some might say that’s a critical issue but the reality is that the vast majority of Shadow 2’s will not make use of the safety at all. However, given the size of the screw and the stipulation for red loctite to be used I highly doubt that it will ever move (which from memory is what Cajun declare in the instructions). Sent from my iPhone using Tapatalk