I’ve seen broken action bars on 870s but never a 760/7600. The shotgun action bars are smaller and have the angled cutouts to activate the shell latches. The 760/7600 action bars have no such cutouts and are one solid piece that is attached to the bolt carrier and therefore much more rigid.
I will say that while not normally a problem the pumps don’t have the extraction camming power of a bolt rifle. The second buck I ever killed I had to give my 760 a Pogo stick whack on the butt while holding the forend to get it to spit the empty out after the first shot. Likely due to a dirty chamber back before I knew any better.
