b p wads
go to princess auto get pack of hand hole cutters select tight fit for your cal...punch a few or a lot from felt 1/8 in thick ...get it from sewing store its cheap ,,,,put in jar with hot crisco then shake and pour out over piece of door screen or dollar store strainer slap on wax paper and seperate hot........keep cool in zip lock i do 3 to 4 hundred every so often and bobs your uncle...........