Since nobody chronos your slugs, you could probably get away with it without any problem. Hadn't thought about that. But, I shoot matches for fun and to add a little stress to the shooting, not to win at all costs. I try to avoid gamesmanship, so I don't use competition oriented gear or tactics. If an 1100 isn't reliable with all the ammo I want to run thru it, then I'll stick with the 870 that is. And put up with a sore shoulder.
Personal weapons are what raised mankind out of the mud, and the rifle is the queen of personal
weapons. The possession of a good rifle, as well as the skill to use it well, truly makes a man the
monarch of all he surveys.
-- Jeff Cooper, The Art of the Rifle