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Jacketed Bullets: The Two Categories

Jacketed Bullets: The Two Categories

Semi Wadcutter Die Set from Corbin

There are two primary categories when considering the topic of jacketed bullets. These two categories are

Jacketed Semi-Wadcutter

And

Full Metal Jacket

Corbin, the major producer of Swaging equipment, notes that these two broad categories help to identify whether a bullet can be made with two die set or a three die set (Corbin n.d.).

Jacketed Semi-Wadcutter
The Jacketed Semi-wadcutter is created by a two die set. First, the lead core is formed to fit into the jacket and then the second die compresses it to the jacket and forms the nose in one go. The nose shape can be virtually any shape so long as it allows enough lead for the die to press into it without striking the jacket. The jacketed semi-wadcutter has a lead shoulder between the nose and the bullet shank. The base of the jacketed semi-wadcutter can be a variety of shapes such as a cup, hollow, dish, flat, etc.. The jacketed semi-wadcutter is most often seen in use with revolvers (Corbin n.d.).

Full Metal Jacket

Full Metal Jackets take a three die set to create. The process is somewhat similar with the major difference being the third die that has a semi-blind cavity to form the curvature you intend as well as an ejection tip to push the bullet back out by the nose. Full metal jackets are easily distinguishable from Jacketed Semi-wadcutters as Full metal jackets have the metal jacket on the curvature of the nose rather than an exposed lead nose as found in the jacketed semi-wad-cutter. FMJ’s allow a number of benefits to the shooter such as less barrel fouling, higher velocity capability, and bullet mass loss during the firing process.

Works Cited

Corbin, Dave. n.d. Corbin. Accessed 04 07, 2019. http://www.corbins.com/nutshell.htm.

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