overpowder en · ADJ
Etymology
From over- + powder.
Meanings
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(not-comparable) Serving to hold in the gunpowder.
On firing, some of the hot gases from burning powder were able to bypass the overpowder and filler wads and reach the shot charge.
2015, Vincent J.M. DiMaio, Gunshot Wounds: Practical Aspects of Firearms, Ballistics, and Forensic Techniques, Third Edition:A two part wad column for use in shotshells is provided which consist of an overpowder component comprising inner and outer concentric cylindrical walls attached to a skirted end plate […]
1971, Canada Patent Office, The Patent Office Record, Application No. 085,160:[…] to allow for the extra space taken up by the special overpowder wad.
1908 July 11, “Rubber Sandwich Wads”, in Forest and Stream, volume 71, page 71: