Federal Master Class 12 Gauge 1oz 2 3/4in Shotgun Ammo 7.5 Shot 1300 25 Rounds MC12HC1 7.5. This Federal Ammunition features 7.5 8 shotgun shells that deliver strong stopping power flawless precision and predictability for competition. . Shop now to get 2 3/4 in shells delivered right to your door. With special offers on Ammunition and other superior shotgun ammo from trusted brands like Federal you re sure to find the unrivaled impact for your next hunting trip or range visit. Stock up today to save big on shells and other top-tier tactical hunting and outdoor gear at OpticsPlanet. What is Federal Master Class 12 Gauge 1oz 2 3/4'' Shotgun Ammunition good for? The manufacturer suggests that it is suitable for competition.Federal MC12HC1 7.5: Master Class 12 Gauge 1oz 2 3/4in Shotgun Ammo 7.5 Shot 1300 25 Rounds