Just a side note. Berdan primers are named after their American inventor, Hiram Berdan of New York who invented his first variation of the Berdan primer and patented it on March 20, 1866. Meanwhile Colonel Edward Mounier Boxer, of the Royal Arsenal, Woolwich, England was working on a primer cap design for cartridges, patenting it in England on October 13, 1866 (same year). In the end, boxer primers are almost exclusively used in North American made ammo and berdan primers are mostly used in Europian made ammo, ironic ain't it?