With the advent of TSS the 20 ga can do things today that it never dreamed up years ago! I have a 20 g 870 with a Carlson 575 choke tube and I use 3 inch Federal TSS #9's and it's flat out awesome on turkeys!! But be advised, those TSS shells are EXPENSIVE to the tune of about 6 dollars per shell in the 20 ga but IMO, ammo is the cheapest part of a hunt!! Good luck!
