Ya know singh, I have to disagree with there findings on the merits of the red potato.I have found then when properly wadded with boiled cabbage, the red potato is far Superior to the russet, both in ft per second and accuracy. The boiled cabbage wadding seems to lubricate the pipe, and increases muzzle/ tail pipe velocity as well.
For the ultimate scatter gun effect, perhaps to be used on the obnoxious Hog riding neighbor, a half boiled red potato can hardly be beat.