None of my UMC or Rem-UMC catalogues offer loaded 4-gauge shells. They offer both 4-inch paper and 4-inch brass NPEs, for black powder only. By the Rem-UMC years they also offer No. 3, No. 2 and 1 1/2 inch NPEs for Yacht Guns. By the 1918-19 Rem-UMC catalogue they offer 4-gauge yacht shell loaded with 18 drams of black powder and 8-gauge yacht shells loaded with 11 drams of black powder. By the Remington Arms Co., Inc. 1923 catalogue they offer no Yacht Gun loaded shells larger than 8-gauge, and the largest NPEs offered are 4-inch 4-gauge (still black powder only) and 3 1/4 inch 8-gauge paper hulls (still not made for dense powder).
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