[Wonder Warthog]

"Until proved differently I will stick with the 0.45 caliber for handguns and 000 buck for shotguns."

Actually, according to one of the world's most expert big game authorities, for man-sized and somewhat larger game (he chose leopards as his example), No. 1 buckshot was better (this from an article read in an NRA magazine some years ago--and no, I don't have reference and link---just memory).

[Mikey_1962]

Sounds Good. I'll add the extension and alternate rounds.