What Rack size?
Over at Dean's World Rosemary is asking us to guess the size of her rack.
I'm with this guess - but yours may vary..
"I'll hazard 2-3/4" 00 buckshot (12 shot) loads in the rack. Probably Remington or Winchester shotshells. Since there's no need for steel shot in a home defense application (since you want the bad guy to contract lead poisoning :D), I'll guess standard lead shot."