A 2 3/4” 12 gauge 00 Buck contains 9 .33 caliber pellets. A 2 3/4” 16 gauge 1 Buck contains 12 .30 caliber pellets.
That load was highly favored for deer hunting in brush down south for many years.
It’s what I keep in my Winchester Model 12 for the home.
Good point, TS.
This is the load I use:
http://www.federalpremium.com/products/details/buckshot.aspx?id=516
in both my Remy 1887 24” Deer Synthetic Autoloader:
and Remy 870 Tactical 24” Blackhawk Pump:
Both have FFL-modified-legal barrels.