Funny you should mention that Ted.
I just now got back from a pleasant day chasing skeets, and shot the final 100 targets of the day with a A5 mag 20. I just bought it from an old buddy who is getting on in years and gave me a chance to acquire what was his first skeet gun. It's a 2 barrel set with a 'buck special' barrel and an IC 26" VR. I even found a period correct Hartmann 2 barrel case for it.
It cycles my standard target load perfectly. I loaded 2 shells 50 times today, it fired and cycled it's little pogo stick heart out for me. The gun weighs the same as and handles exactly like a Sweet 16.
I also have a 'Light Twenty', and it's a tad whippy. It works, but requires a short leash where the mag 20 just seems to point itself.
One of the funnier auto stories... I bought an early HK Benelli field model, the one with the plastic stock and the 3" chamber. It's light and reliable. A very good duck gun, and it will cycle my 1 oz. target loads if I load to 1250 fps. I figure if you can't do it with a 3" 12, you can't do it.
So, a genius at the club liked my gun and went out and bought one just like it. This guy considered himself a 'gun writer' although where he might have been published remains a mystery.
It seemed to recoil a bit so he added weight. Guess what happens to an inertia gun when you add weight. It becomes a single shot.
This was somehow my problem to solve. Sheesh.