RC Cartridge RC3 Competition 12 Gauge 1oz 2 3/4in Shotgun Ammo #8.5 250 Rounds. This RC Cartridge Ammunition features 7.5 8 8.5 shotgun shells that deliver strong stopping power perfect precision and reliability for competition. With premium plastic shotgun shells . Buy now to get 2 3/4 in shells delivered right to your door. With amazing deals every day on Ammunition and other high-quality shotgun ammo from trusted brands like RC Cartridge you re sure to find the unrivaled impact for your next outdoor adventure or training session. Stock up today to save big on shells and other top-tier tactical hunting and outdoor gear at OpticsPlanet. What is RC Cartridge RC3 Competition 12 Gauge 1oz 2 3/4'' Shotgun Ammunition good for? The manufacturer thinks that it is best for competition.RC Cartridge RC31H85: RC3 Competition 12 Gauge 1oz 2 3/4in Shotgun Ammo #8.5 250 Rounds