It’s winner-take-all for 100 Thousand Dollars. ATA is the Amateur Trap Association and the largest of the sanctioning bodies for shotgun sports. The biggest event in ATA competition is the Grand American, nearly two weeks of clay bird shooting at the nation’s largest shooting range in Sparta, Illinois. Pro Tip – Sgt. Josh Richmond on Trap Hold Points Inside Ithaca Gun Company - Made Right in the USA RCBS Reloading Tip – The Grand Shotshell Loader