Yeah I did notice after 100 shots fired my Benelli was still chugging away and my shoulder was fine. My left arm did hurt as, well, it IS a tactical/hunting shotgun. LOL
I did try someone else's trap gun, and they're noticably lighter. Then again, they're only designed to do one thing. I'm glad mine is more than that.
Oh, and I'll probably go with plastic wads next time. Cleaning out the barrel there was a ton of little fibers from the wads. After putting a good amount of Hoppes in there, cleaning it out it looked like black snot. LOL