Case (a.k.a. The Hull) – The modern shotshell case is
similar to the case on a rifle or pistol cartridge. The hull
is normally made from plastic, paper or, in rare cases,
brass. It will also have a steel or brass head and rim
attached. The case is designed to contain the powder charge,
primer, wad and shot. Hulls are available in a variety of
lengths such as 2.75”, 3”, 3.5”. The length of the hull
refers to the overall length when the shotshell is fired.