I'm sure the 935 will safely fire ONE 2 3/4 " shell, but the shorter, lower powered shells won't cycle the action. There will be insufficient power to cyle the action to eject and then load the next round.

If it were a pump it would say that it could handle all three sizes, because the expelled gases don't do the work, the shooter does.

BUT, b/c it's a auto loader you'll have to stick to what it's designed for.