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The following paragraph is weak - "It is unknown as to who or which company originally designed the cartridge except that it was designed sometime in the 1860s in the United Kingdom. Several manufacturers of firearms produced rifles and loaded ammunition for the cartridge type, however significant differences and variations existed between manufacturers." Paragraph seems to indicate that the designs were varied, so it not clear what/which "it" was designed, except that the type/class was introduced soon after centerfire primers were invented. Were the oldest .500 cartidges Berdan or Boxer primed in the late 1860's? — Preceding unsigned comment added by 144.183.224.2 ( talk) 22:46, 10 May 2013 (UTC) reply