Bill,
I have/had Mossberg's, M12's & 1200's, and in Viet Nam we had what I remember to be a Remington. All were easy to operate and the 1200's almost shuck themselves with their rotary bolt. The M97 in question, I suspect, spent most of the last 64 years in a closet. My brother had a M97 40 years ago and I just don't remember how easy or difficult she was to shuck. This gun is tight!
eeb,
I have a MEC Grabber and a 9000 and do pay attention to the resizer. The hulls were not once fired, but were on about their fourth loading. Still they ran smooth as silk through a M12. I bet there was just a loose nut (me) behind the trigger!
Harry