then again, the taller shot colums can give you a longer shot string in a 20 compared to a 12. but to be honest, no ordinary shooter will ever notice much difference, except at range when the 20's shot pattern starts to thin out a bit too much. good for pheasant,grouse,partridge etc out around 35 yds though with standard loads. aim it in the right place and the kills will come...always my problem.
damn pheasants, so expensive to miss in the U.K. and almost as expensive to kill (tips etc) .
good hunting.
stu