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A '''hull''' is the shotgun shell equivalent of a case, but is otherwise identical in function.
Cases and hulls may be found in one of two states: '''Unprimed/Spent''' and '''Primed'''. The term "spent case" specifically refers to the case that remains after a round has been fired, but otherwise, they are considered identical to unprimed case, in that they do not have a live primer inserted. A '''primed case''' is a case with a fresh primer inserted. Unprimed cases can be found for sale at gun shops and weapon shops, in boxes of 50. Primed cases can never be found or purchased; they have to be made, as part of the process of handloading. The Weight of a case (primed or unprimed) is the same as that of a complete round of ammunition. E.g. a [[.45 ACP]] case will have a Weight of 0.02.
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