1) Firearm terminology 
a premature, unintended discharge of a firearm that occurs as a round is being loaded into the chamber.
A slamfire is a premature, (usually) unintended discharge of a firearm that occurs as a round is being loaded into the chamber. Slamfires are most common in military firearms that have a free-floating firing pin, as opposed to a spring-loaded one. In the action of a typical semi-automatic firearm, the energy of a fired round forces the bolt and bo...