doubles
Most of my doubles are 28" barrels. I have one old Ithaca that has 30" tubes and a LeFever and a Baikal IZH-43 that have 26" barrel (I'd rather they were 28"). I most often hunt with an old Parker with 28"ers.
Occasionally (more as time goes by) I hunt in the PA uplands - aspen, birch, barberry, huckleberry - with a flintlock fowler, 20 gauge, 40 inch barrel. Not when it is thick, though. I have a Navy Arms SXS caplock with 24" barrels for close flushes and BP.
Pete