I apologize if this subject has been beaten to death in past posts, but I am getting quite a bit of conflicting opinions and need some fact based information to educate myself and settle this argument once and for all. As it applies to 12 gauge 3" and 3.5" shotguns, with the advancements in turkey shells and chokes both specifically designed for maximum effective pattern densities does barrel length matter to any degree that would be regarded as significant advantage to the added length? I'm referring to specific length differences of 20" VS 23-24". In other words if you were going to buy a 835 Ultimag would one see significantly better pattern density from the 24" barrel VS the 20" barrel model? Lastly if you are using TSS shells again does barrel length matter? Thanks, Arthur.