One only needs to look at the top winners in the game to see that todays top shooters usually shoot a combo gun with a 34" single barrel, usually an unsingle for singles and handicap. Personally I prefer a 32" unsingle. I find it gives me a nice swinging and quick to get to 16 yard sighting plane and still decent mid-range handicap gun. I am currently a 25 yard handicap. At 26-27 I preferred the 34" as long yardage requires less target angle leads and the longer barrel got me out in front of the target a bit easier and with a nice smooth swing. However all around I prefer the nice overall all around characteristics of a 32" single barrel. For doubles I prefer a setof 30" barrels. I find them much faster to get on the first target and across to the second target. I find 32" doubles barrels just a bit slow on doubles for my liking and current abilities. As for anything other than a break action gun I would run a 30" barrel at minimum. A 28" is fine for small shooters but lack the swing characteristics required to shoot consistent handicap scores beyond the 20 yard line.