Hell, I dont know, Buzz. I didnt go out and buy an A5-this one was left to me by my Father, the A5 I owned previous was left to me by my neighbor. That one had a broken ejector, and still worked 98% of the time. It was stolen from a guy who borrowed it for a trap league, but, I had nothing into it, save buying the ejector, so, I told him not to worry about it.
The only time I use the gun is in nasty conditions for late season pheasants, and I doubt I have ever fired anything but 1 1/4 oz 5s and 6s in it, since I have owned it.
Im not going to seek out a 1 oz load, and take it woodcock or grouse hunting. My A5 isnt what one would call, svelte or rapier like.
More like a 3/4 ton truck. If it recoils more or less, I cant say, the wool shirt and the jacket soak it all up in those conditions.

Best,
Ted