I own pumps, doubles, and single shots. I feel about as well armed with one as the other. If I were taking doors with a SWAT team, I would want either a semi-automatic or pump riot gun. For home defense, I am fine with a break-open H&R Topper, barrel cut to 20 inches, with a couple of extra buckshot in a cuff. 12 gauge, 2 3/4". Spend some time on a dove field with a single shot or double gun and you will become very proficient at quick "tactical"
reloads. Do a youtube search for Clint Smith with a single shot shotgun. You will see what a viable tool a single shot is for home defense. A good double "coach gun" is twice as good.
I have good, but cheap, single shot shotguns stashed in trucks and outbuildings at the farm. No telling when I might run up on a varmint.