Doyle, I dont understand your poor results with .22 shotloads. I have killed hundreds of birds in dairy barns out to probably 25 or 30 feet with shotloads out of my 6.5 inch single six revolver. Shooting them out of a rifle adds maybe 10 feet to the range. Plenty of range to reach the roof in most barns.
Windmill, glad it worked out for you, clean those s&%tmachines out !!