I've been told that some Autos won't cycle properly on low brass 2 3/4" shells.
Otherwise blast away, I have some older 2 3/4 steel shot I'm shooting in my Rem. 800 Super Magnum, I'll shoot them until they are gone for sure.
Good Catch Nick, sometimes with a picky semi shotgun you can lube up the contact points and get it to function while some just won't operate with the low brass cheapo shells...