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The .219 Zipper is the parent case of the .219 Donaldson Wasp, and P.O. Ackley created the .219 Zipper Improved in 1937. Leslie Lindahl's Chucker and Super-chucker and "wildcat" case modifications by Hervey Lovell, Lysle Kilbourne, and W. F. Vickery offered similarly superior ballistics in stronger single-shot and bolt actions.
Reloading dies for the round are readily available. The .225 Winchester's case is a parent case for some of SSK Industries ' [ 3 ] popular line of JDJ cartridges designed by J.D. Jones , chosen for its strength and semi-rimmed design which makes it well suited for use in break-open actions.
The .219 Donaldson Wasp / 5.7x44mmR intermediate cartridge was developed during the late 1930s by Harvey Donaldson, and is derived from the .219 Zipper case. Cases have been formed from .25-35 Winchester , .30-30 Winchester , and .22 Savage Hi-Power brass. [ 1 ]
Parker Otto Ackley (May 25, 1903 – August 23, 1989) [1] was an American gunsmith, barrel maker, author, columnist, and wildcat cartridge developer. The Ackley Improved family of wildcat cartridges are designed to be easily made by rechambering existing firearms, and fireforming the ammunition to decrease body taper and increase shoulder angle, resulting in a higher case capacity.
The .218 Bee cartridge was designed by Winchester for use in their Model 65 lever-action rifles. Winchester designed the cartridge by necking down the .25-20 Winchester cartridge to accept a .224 diameter bullet. Just as the .32-20 can be considered to be the parent cartridge of the .25-20, it can also be considered the parent cartridge to the ...
Working from engineering drawings developed by the toolmaker, engineers or technologists, tool makers lay out the design on the raw material (usually metal), then cut it to size and shape using manually controlled machine tools (such as lathes, milling machines, grinding machines, and jig grinders), power tools (such as die grinders and rotary tools), and hand tools (such as files and honing ...
A die is used to cut or form the male portion of the mating pair (e.g. a bolt). The process of cutting or forming threads using a tap is called tapping, whereas the process using a die is called threading. Both tools can be used to clean up a thread, which is called chasing. However, using an ordinary tap or die to clean threads generally ...
The better designs use heavier pipes and spring-loaded trigger mechanisms. Larger zip guns, such as homemade shotguns called tumbera (Argentina), bakakuk [ 7 ] (Malaysia), or sumpak [ 8 ] (Philippines) are also made of improvised materials like nails , steel pipes, wooden pieces, bits of string, etc.