For the last few years I've used a semi auto gas gun. Mossberg 930. I spent a lot of time in the 70's carrying a bolt action Mossberg. It had a C-Lect choke affair on the end of the barrel and you could tune it in pretty nicely for the Remington 4 buck loads I Coyote hunted with. Anybody out there use one now? I'm thinking I need to watch the Gun Shows for one. What were the tube fed models? The one I used had a 2 shot detachable box magazine