![]() Jacketed bullets also functioned more reliably and are less likely to be deformed in the mechanical loading process of self-loading pistols and machine-guns.Ī pair of French, 19th century Duelling pistols. Although it took several decades to devise bullet jacket alloys and manufacturing procedures to duplicate the accuracy of cast bullets at lower velocities jacketed bullets were more accurate at the velocity of 20th century military rifle cartridges. Manufacturers of high-velocity military ammunition modified their bullet swaging process to apply a thin sheet of stronger metal over the soft lead bullet. Higher velocity smokeless powder loadings caused lead to melt and be torn from soft bullets to remain in the barrel after firing in small deposits called leading. ![]() Disadvantages became evident as loadings shifted to smokeless powder in the late 19th century. Swaging, rather than casting, became a preferred manufacturing technique during the 19th century industrial revolution but cast bullets remained popular in early rimmed black powder cartridges like the. Minié balls of the mid-19th century could be either cast or swaged.
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