Real
I have used #4 buckshot, 3 inch shell, on a predator clawing his way into my chicken coop once. I was 110 feet away, measured. That's about 33 yards, if my math is correct. It was only a 15 pound predator, but the shot broke a leg and went through a shoulder. Not every pellet hit, but any of them would have done the deed. I was shooting a 20 inch barrelled over/under, with a modified choke.
My point is, the load was sufficient. Sure, it was a smaller animal, but a shotgun pellet breaking two bones is a convincer for any size critter. If it was a turkey, I might have lost some meat, for sure.
Based on that experience, at indoor distances, for home protection, heavy buckshot isn't entirely necessary. The suggestions by hsiF deR and bigbulls sound like good advice to me. Bigger isn't always better, especially when "small game loads" aren't yet getting sucked into a feeding frenzy. $6.99 for 25 #6 Federals at Bass Pro, last time I checked, and they were gathering dust....:blink: