I keep mine loaded with Hornady TAP 00 Buck...
The shot pattern on that round is nice and tight when compared to others. Here's a test I did with my Rem smooth bore 870 last summer. All shots at 15'.
This is Federal copper plated 00 buck...2 3/4" (1 shot shown):
This Winchester "buffered" 2 3/4" military 00 buck (two shots shown):
And the Tap (three shots shown):
That's a HUGE difference between the three at that short of a distance...imagine some 30+ yds distance, the difference would be feet, not inches.
It's ran me $14 for 10 rounds. I don't "plink" with this ammo, I trust me life and safety with it. When it comes to me defense shotgun I don't mess around.
I need to do another test this summer with my FN TPS...it's actually internally choked for buckshot, I wonder how the outcome will be.
Lastly...I have never read anyhting from any expert stating using any damaging shot for home defense is a good thing. BB shot for a defensive weapon is a joke...as is birdshot...when you have a home intruder, you shoot to kill and in as few shots as possible...not "damage" them with a bunch of pellets.