Beats carrying it by the bolt knob by multitudes of better.
If you carry hot-even if it doesn't mess with the screws-I wouldn't think it that great of an idea, what with the safety and trigger being down there and the possibility of them bumping and rubbing who knows what.
Addition: There is an old time warning of being extra watchful around those in the field who carry a shotgun around in one hand dangling at their side.
