https://www.trapshooters.com/thread...g-shotgun-at-the-traps-1905-1910.812155/

The great Rolla Heikes and Charlie Budd were using new-fangled Remington Autoloading Shotguns in 1906

[Linked Image from photos.smugmug.com]

J.J. Blanks won the 1907 GAH with one

[Linked Image from photos.smugmug.com]

As did Fred Harlow in 1908

A list of GAH winning shotguns is here and you'll note that repeating shotguns became increasingly popular, then SBTs
https://www.trapshooters.com/threads/list-of-shotguns-used-by-trap-winners.256401/

Mr J S Gibson, secretary of the Clay Pigeon Association inspecting a Remington Auto Sportsman with horror in 1931 wink

[Linked Image from photos.smugmug.com]