Brenneke Magnum 12 Gauge 1 1/2 oz 3in Centerfire Shotgun Ammo 5 Rounds. It is designed for rifled barrels. The flat trajectory is an ideal choice for bigger game at a variety of ranges. It has a special coating to reduce lead fouling and its broad ribs provide optimum engagement of the rifling grooves resulting in extraordinary accuracy and unmatched impact power. Specifications for Brenneke Magnum 12 Gauge 1 1/2 oz 3" Shotgun Ammunition: Manufacturer: Brenneke Gauge: 12 Number of Rounds: 5 Shot Size: Slug Shell Length: 3 in Muzzle Velocity: 1604 ft/s Application: Hunting Included Accessories: None Shotgun Shot Weight: 1 1/2 oz Primer Style: Centerfire Length: 3 in What is Brenneke Magnum 12 Gauge 1 1/2 oz 3" Shotgun Ammunition good for? The manufacturer suggests that it is best for hunting.Brenneke SL123CMR: Magnum 12 Gauge 1 1/2 oz 3in Centerfire Shotgun Ammo 5 Rounds