I make 9mm PB gas checks. Mine are a shallow cup.I know some of you make 9mm pb checks with a deep cup . Mine are with the typical pop can/beer can aluminum. I have shot these out of a 9mm pistol and 38 revolver with good results. Good accuracy and no leading. I would like to propose a trade of 9mm gas checks. I would like to try the deeper cupped checks. Maybe some or you would like to try a more shallow cup check. I make mine both ways paint in and paint out. It does not seem to matter which way they are made. Mine size on in the accepted way of the thin gas check. Backwards through a push through sizer or a in and out sizer like a lyman 450. I can put up for trade from 50 to a 1000,whatever anybody likes. I have made many of these.
n.h.schmidt