[Researcher]

From what I've seen only Winchester and Union Metallic Cartridge Co. later Remington Arms - Union Metallic Cartridge Co., etc. offered 4-gauge NPEs and 8-gauge loaded shells and NPEs. None from Western Cartridge Co., Peters Cartridge Co. or U.S. Cartridge Co.

Union Metallic Cartridge Co. 1900 --

8-gauge TRAP Shells 1900.png

1901 --

8-gauge TRAP Shells 1901.png

1905 --

8-Gauge Trap Shells 1905.png

1909 --

8-gauge ARROW Shells loaded with Black Powder June 1909.png

8-Gauge ARROW Shells loaded with Bulk Smokeless June 1909.png

Remington Arms - Union Metallic Cartridge Co. 1913-14 --

8-gauge ARROW Shells loaded with Black Powder 1913-14.png

8-Gauge ARROW Shells loaded with bulk smokeless 1913-14.png

The Remington Arms Union Metallic Cartridge Co., Inc. 1918-19 --

8-gauge ARROW Shells loaded with Black Powder 1918-19.png

8-gauge ARROW Shells loaded with Bulk Smokeless 1918-19.png