I have a couple of friends that insist that long barreled shotguns shoot further than short barreled shotguns with both guns using the same ammunition & have the same "choke". Can you elaborate? One ...
if you use the same ammo--> you get the same distance
because the ballistic traveles more if you give it more pressure at first therefore more powder leading to a larger casing (diff. ammo)
so no matter the barrel's length, the shot's distance is a matter of powder.