Winchester Ammunition AA SUPER SPORT, 410 Gauge 2.5, 1/2 OZ, #7.5, Sho t Shell, 25 Round Box AASC417 Since 1965, AA has been recognized as one of the finest quality target shotshells ever developed, continuing the Winchester tradition of legendary excellence with unparalleled target-breaking performance that revolutionized the target shooting and reloading industry.