Federal #4 Buck 27 pellet in my HD shotgun. My patrol shotgun is loaded with Federal Flite-control 00 buck LE13200.
I really like the #4 in the house. 27 pellets of .24 caliber is no joke and it patterns well out to about 20 yards, much farther than any distance inside my house.
I like that the #4 seems to spread early compared to 00, atleast in the pattern tests I have done.
Its really devastating up close, but loses energy and the patterns spreads really far at distance.