Beretta A400 extreme plus 20 gauge choke re

[double-lung]

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

[Ihuntoldschool]

Anything 580 to 585 range will do all you can ever ask for in 20 Gauge with lead. 

Good out to 35 yards.