Without the cylinder in place to hold the hand back in its channel, the hand spring can push the hand forward far enough to hang up in its slot in the recoil shield. Some OT's / conversions do it, some don't, due to the amount of hand fitting required with these parts. It is not considered a defect. If you have a need to go to full cock without the cylinder in place, you can push the hand back into its slot while pulling back the hammer.