RE: 00 Buck vs. #1 Buck for deer
I've seen a pile of whitetails (some very big bucks) dropped with #4 buck at 40 yards...
The secret is to pattern your shotgun to MAKE SURE it patterns with whatever you use!!
AND aim at the point on the deer where the neck meets the body!!! This will place most of the pellets in the head, neck, heart and lungs.... (depending on the tightness of your pattern at the distance you shoot)
DM