ORIGINAL: driftrider
Of course, I'd probably more strongly recommend that you ditch the buckshot and go with rifled slugs. They'll give you longer range and are far more lethal. Buckshot doesn't exactly have the best rep as a humane deer killer.
Mike
I agree, if you have to use buckshot check out the Dixie slug companies tri-ball load. It has 3 balls that are .600 diameter.
http://www.dixieslugs.com/products.html