Originally Posted by Pisgah

Same here, but I go a bit further. I de-prime a fired case, put some silicone inside as well as in the primer pocket, and seat a bullet to the correct OAL. I then paint the whole thing black with a Magic Marker so I don't mistake it for a live round (or vice-versa), and I end up with a dummy round/snap cap that'll feed manually from the mag and last for hundreds upon hundreds of "shots".