(under subclass 448) Subject matter wherein a plug, packing,
etc., is used as a spacer, seal, cushion, etc., in a shot cartridge and is so constructed that it will cave-in breakdown, etc., when the cartridge is fired.
SEE OR SEARCH THIS CLASS, SUBCLASS:
450+, for collapsible wad used in a shot container.
532, for wads not provided for here or the above search subclass.
