I found a whole box of RCBS 22 cal. 55 gr. boolets I forgot I had they are pure lino (52gr). They fall from the mold at .2255 and I snapped on a Hornady check and through a Lee .224 push through. Hard push and the pusher deformed the check leaving an uneven shoulder around the edge. I will probably try shooting them unsized as the checks seem to snap on. Rifle is a CZ-527 hornet they are reputed to have .223 tight bores any problems as long as they will chamber.?? Frank C.