I've killed a few with the standard Winchester #8s. 2-1/2 dram 7/8 oz shot. I reload now but still use 7/8 oz with 7-1/2s and 8s. I personally think some of the heavy game loads are overrated for birds. Might draw some fire for saying that but there's no need to spend a lot of money on them when the 1200 fps loads will drill 'em. Ya gotta start somewhere! Don't feel behind the curve with a 20 ga.