HEY! I just measured my barrel, I expected a slight normal taper, but at the gass block, .559, just aft of the machine mark (2 1/2 inches aft of sight) barrel measures .575, then just fwd of the machine mark .562, and just behind sight .562. ***Is anyone elses barrel lumpy ? I can run my finger & thumb down the barrel and feel it! Like a chicken snake just swalled a chicken! My mini is a 196 series SS Ranch. How about yours?