Too late to edit, but fixing bad link above to DB's latest:
https://www.facebook.com/people/DBs-...0027351922366/
Flagging one comment of his in light of above:
"The caliber is interesting. It is a rifle cartridge coming out of a barrel less than two inches. As a small light bullet, recoil is minimal and it is super easy to shoot, but it barks like a bigger gun. All that blast and noise is a benefit for near contact shooting."