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#3 | ||||||
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You have to go back quite a ways to see the A and B shells. This from the 1880 Union Metallic Cartridge Co. catalog --
1880 UMC Catalogue.png and 1885-86 -- 1885-86 UMC catalog pages 12 & 13.jpg mention A and B sizes. By the 1887 UMC catalog there is no mention of A and B sizes -- 4-gauge 1887 brass.png |
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