Was thinking the same as Walt because of all those I had that were commericla made for 22 cal pellets (up to 22-250 cases). Works best with a dimple just behind the case rim though to help hold the pellet straight and at a consistent sesting depth. The pellets wouldn't be strong enough to get too slap happy with powder charges driving them though (you could ask how I know that, but since you know me Alan you won't have to).