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superposed load
A superposed load or stacked charge is a method used by various muzzleloading firearms, from matchlocks to caplocks, as well as newer Metal Storm weapons, to fire multiple shots from a single barrel without reloading.
==Design==
Superposed loads are loads that are placed in the barrel, one on top of the other, so that there is an alternating sequence of (from the breach end) powder, ball, powder, ball, etc., for the desired number of charges. Each charge is accompanied by a corresponding touch hole that allows ignition of that charge. In the simplest case, the matchlock, each touch hole is individually primed and ignited with the match, front to rear. Each ball behind the first acts as a seal, to prevent ignition of the next charge.〔
Flintlocks using superposed charges often involved a sliding lock, that slid along the barrel and locked in place at each successive touch hole. The lock would be primed, cocked, and fired at each touch hole to discharge successive charges. Some caplock designs used multiple hammers, each impacting a nipple leading to a different charge, allowing true rapid fire.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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