I know the Winchester 55 well. My cousin had one when we were boys or maybe young men. It's a single shot semiauto if ya can believe that. It kicks out the empty like a semiauto and then you push down on the cover on top and insert the next round. IT was nicely accurate but shot the best pattern with rat shot of any rifle I've ever seen.
I vaguely recall the Remington 34 also but can't recall who it was I knew that had one. Less familiar with it.