When Union Metallic Cartridge Co. began offering factory loaded shotgun shells, circa 1891, They offered 10-gauge shells loaded with as much as 5 drams of powder and 1 1/4 ounce of shot. By the 1893 catalog where the SMOKELESS and TRAP shells loaded with smokeless powders were charted separately from the CLUB black powder shells, the heaviest smokeless powder loads offered were 3 3/4 drams pushing 1 1/4 ounces of shot. For 1905, UMC upped the maximum 10-gauge load in their ARROW shell to 4 drams of bulk smokeless powder pushing 1 1/4 ounce of shot. The next year UMC upped the maximum 10-gauge load in their ARROW shell again to 4 1/4 drams of bulk smokeless powder (or 34 grains of dense smokeless powder such as Infallible or Ballistite) pushing 1 1/4 ounce of shot. That remained the heaviest smokeless powder 10-gauge load offered until Western Cartridge Co. introduced their high velocity, progressive burning powder, Super-X Super-Ten load of 1 5/8 ounce of shot.
|