Shotshell casing with reduced volume basewad and increased interior volume for larger shot loads

摘要

An improved reduced volume plastic basewad for a shotshell casing includes a generally solid cylindrical plastic body portion, an annular outer continuous skirt portion merging integrally and upwardly from the body portion, and a raised annular inner continuous hub portion merging integrally and upwardly from the body portion. The skirt and body portions define a continuous exterior surface sized relative an interior surface of a plastic tube of the casing for tightly frictionally fitting within the tube at a bottom end portion thereof providing a gas seal with the tube interior surface. The hub and body portions define a continuous interior surface forming an elongated pocket for receiving a primer in a tight frictional fitting relation in the pocket with an upper end of the primer disposed adjacent an upper end of the hub portion. The hub and skirt portions are radially spaced from one another and define respective exterior and interior surfaces which merge with an upper surface of the body portion so as to define therebetween and above the body portion an annular continuous concavity for containing a portion of a propellant charge placed in the tube below and rearwardly of the top end of the primer so as to thereby increase the interior shot load holding volume of the tube.