guy i know made a deprimer with a case holder tacked to a vice grip with a rubber cone tacked to the other side and pops the primers out in a bucket of water using water pressure guy i know made a deprimer with a case holder tacked to a vice grip with a rubber cone tacked to the other side and pops the primers out in a bucket of water using water pressureYes, I have heard of that method. There are commercial systems available.