For small game give me #4 or #5. Rather not put much shot into the meat.
Never had trouble killing rabbits or squirrels with either but it has been over 25 years since I used a shotgun on anything other than rabbit hunting with beagles where I used a .410 and #5s.
#4, 5 or 6 fine for turkeys.
7 1/2 for doves or quail.
If limited to 1 shot size for everything I would be okay with #6 shot.
Home defense BB, #2 or #4 shot. If buckshot I am fine with #1, 3 or 4 buck.
YMMV.
Last edited by 10gaugemag; 06/17/23.