Brenneke Magnum .410 Gauge 1/4 oz 3in Centerfire Shotgun Ammo 5 Rounds. Its one of the heaviest 410 GA slugs on the market giving you deep penetration even on longer distances. Comes with built in superb knock down power. Specifications for Brenneke Magnum .410 Gauge 1/4 oz 3" Shotgun Ammunition: Manufacturer: Brenneke Gauge: .410 Number of Rounds: 5 Shot Size: Slug Shell Length: 3 in Muzzle Velocity: 1755 ft/s Application: Hunting Included Accessories: None Shotgun Shot Weight: 1/4 oz Primer Style: Centerfire Length: 3 in What is Brenneke Magnum .410 Gauge 1/4 oz 3" Shotgun Ammunition good for? The manufacturer suggests that it is suitable for hunting.Brenneke SL4103M: Magnum .410 Gauge 1/4 oz 3in Centerfire Shotgun Ammo 5 Rounds