Very well said --- possibly transcendent!!
All else being more or less equal, shorter barrels equire less muscle effort (lower MOI) to be pointed in a different direction (swing), both from between-the-hands and from the shoulder.
Handling dimensions/measurements/facts, like stock dimensions, need to be fitted to the individual and the purpose of the gun. "My grouse and trap gun ---" is a bit of a firearms oxymoron. "My grouse and casual skeet gun ---" makes more sense. Some have the "touch" to shout low swing effort guns well and others have "touch" not.
