Something to consider when you buy your shotgun shells. I buy all my defensive shells in 2 3/4″ so no matter what gun I’m stuffing them into they will fit. My Mossberg is 3″ but my son has an old 1100 with a 2 3/4 chamber. If we are scrambling around arming up we can’t be bothered sorting out ammo or having it get mixed in a fight. Additionally if we find another gun to use it will fit regardless of the model.