Good discovery - pity these pellet are not easily available over here. Have you tried any other wadcutters? Maybe its not so much the length of the pellet but more the fact that with wadcutters, the head of the one in the feed tube doesn't sit in the hollow of the pellet in the breech block and so "chopping" is less likely when the action is snapped shut? It would be nice to know if other brands of wadcutters could work as well.