Browning Belgium Autoloader
I am an old man and was always taught to appreciate the quality and features of a Browning Auto 5 made in Belgium. My favorite shotgun was made in September, 1953, and it shoots harder and gets more distance than any of my newer shotguns.
Nothing gas operated about it and it will handle low power and high power loads.
IN addition, I have the full Reminton 1100 series in each gauge. While they are nice guns, I take the Browning when I want to do serious target or game shooting.