Often the choice arises to remove ammunition from a cylinder and package it separately (risking loosing fingerprints) or leaving it in the revolver (risking the hazard of a loaded firearm!). After marking the
cylinder position with a “Sharpie” pen, consider using a styrofoam cup to secure the cylinder! Tear a channel down from the mouth to the base of the cup, and place it over the rear face of the cylinder.
It will keep the ammo in place and does NOT touch the cylinder walls!