It has in large part to do with the fit of the gun to your build. You mentioned the B. Rizinni not being comfortable for you. I shoot a B. Rizinni 20 (different model from yours, however) that is absolutely the sweetest shooting gun I have in my fairly large collection, absolutely no felt recoil at all. A 20 ga Browing in my safe (usually stays in the safe for this reason) jars me much more, with the same loads.