Hodgdon Powder Company, Shawnee Mission, KS

Midaway USA, major national supplier located near Columbia, MO.

Graf & Sons, Mexico, MO

Denny Dennis Sporting Goods, Fenton, MO (St. Louis area)

Guns N Stuf, a site covering about anything to do with guns

Gamaliel Shooting Supply, located in Kentucky but ships anywhere.

Skeet-n-Clays Mall, links to clubs, associations, suppliers & products.

Shotgun World's Bulletin Board includes discussions on skeet-rlated topics.