A couple link to articles about shotgun ammunition choices worth reading.
http://www.theboxotruth.com/the-box-o-truth-56-federal-flight-control-1-buckshot/
https://pistol-forum.com/showthread.php?4340-12-gauge-shotgun-loads-for-LE-duty-use
Never even thought of #1. Great links (thanks!) ... now I am sold. Once I get through the 500+ rounds of 00 and #4 I have ... that will be my next load.