With all due respect, backing off the trigger/bolt spring screw may make it take longer for a drag line to show up but it is not a cure for the problem and may cause the lockup at full cock to be somewhat loose. The problem is caused by the leg of the bolt that impinges on the hammer cam being slightly too short. The cure is to replace the bolt with one having a slightly longer leg. The bolt should nearly completely retracted into the frame at the point the hand picks up the cylinder ratchet.
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