Adjustable volume shot wad structure and method of assembling th

Details Adjustable volume shot wad structure and method of assembling th Adjustable volume shot wad structure and method of assembling th

1986-06-27

1988-03-29

Nelson, Peter A.

Ammunition and explosives

Wads

102450, 102461, F42B 708

Patent

active

047336137

ABSTRACT:
An improved shot wad structure has a longer outer wad cup, a shorter inner wad cup and a plastic wad insert, and is useful in a shotshell with hard shot pellets, such as steel or tungsten shot. The outer cup, formed of a soft, low tensile strength material, such as polyethylene, is capable of obturating combustion gases produced in a gun barrel when the shotshell is fired, whereas the inner cup, formed of a tough, high tensile strength material, such as nylon, is adapted to support a shot column and is capable of withstanding compressive forces generated by shot acceleration to protect the barrel from being scored by the hard shot. The wad insert, disposed within the outer cup above its bottom and below the bottom of the inner cup, is formed of a foam material which is one-way crushable for permitting insertion of the inner cup within the outer cup to any one of several different depths therein at which a corresponding number of different volumes of space are defined within the outer cup for containing shot columns of various shot load sizes. The wad insert once crushed still has sufficient compressive strength to support the inner cup at the desired depth within the outer cup.

REFERENCES:
patent: 3053185 (1962-09-01), Oberfell et al.
patent: 3420178 (1969-01-01), Rempel
patent: 4290365 (1981-09-01), Dreyer
patent: 4307664 (1981-12-01), Vollers

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