I have just purchased a 20 gauge A400 extreme and am needing advice on choke tubes. As I have several boxes of Federal Premium #5's I will be using these for the time being. Also plan to top it with a Holosun 509
Anything 580 to 585 range will do all you can ever ask for in 20 Gauge with lead.
Good out to 35 yards.
Indian Creek was the best in my A300 but I was patterning with TSS.