A 20g hands down. Since there was no stated requirement that this was sustanance shooting, I take it is all for my pleasure. It would please me more to take a 6 lb 20g and shoot all these birds even if I took less birds, I'd be so happy with all the hunting, the number of kills would not be a priority...at all.

So, before all of you 12g guys jump on me, remember back and think if you are among those that have said 'I don't need to kill birds to enjoy myself hunting'. I know I never said that. I go hunting to kill birds. It doesn't have to be a lot, but some birds are required. Otherwise it's just hiking to me.