Well your link puts a 9.5 lbs 338 Lapua Mag. rifle loaded with 225 gr bullet at 3000 fps at 37.2 ft*lbs of recoil energy with 15.9 fps of recoil velocity. Mind you, if the heavier 110 BA comes in at 20 lbs loaded with glass and stuff, that more than cuts this recoil to half from the numbers here.

Considering your link puts my clay gun 32 ft*lbs of recoil energy. And I can operate tgat gun all day long.

But all these numbers only tell part of the story I think. Because I can tell you for a fact that 1.25 oz of slug recoils a great deal more than 1.25 oz of bird shot.

Best I can do as you say, is to try it. But that gun will become a very expensive paper weight if I am forced to shoot it with a brake on. I imagine it would be ridiculously loud and unpleasant with a brake.