Suppose to post war French that made it to Israel. The same kind of main gun on the Ishe-Sherman tank rebuilds. The only guys that shoot all the time are all the 20mm owners. Easier to load w/ practice tips. There was one guy w/ a 57MM AT Cannon, that was using a rubber malleet to "re-size" his brass just enough to fit into the breech..

Then he primed it, charged it and used a hand casted projo for the next session..