Does anyone do it? I have a Remington 870 with 18.5 barrel and cylinder bore and am thinking about using it for grouse this weekend if the opportunity arises, however I have only ever used field barrels with full or modified chokes and have no idea how well cylinder bore will work. I never have a chance to shoot at birds on the fly due to the terrain and vegetation if that matters and almost all shots are inside 20 yards.