Winchester Defender Shotshell 12 Gauge 1 oz 2.75in Centerfire Shotgun Buckshot Ammo 10 Rounds. Simply put these personal defense loads are equipped to deliver ultimate threat-stopping power at both short and long range. Best of all these shells are backed by the 140 years of experience of all Winchester products not to mention the company's commitment to quality. Specifications for Winchester Defender Shotshell 12 Gauge 1 oz 2.75" Shotgun Buckshot Ammunition: Manufacturer: Winchester Gauge: 12 Number of Rounds: 10 Shell Length: 2 3/4 in Muzzle Velocity: 1150 ft/s Included Accessories: Standard Application: Personal Defense Shot Size: Slug 00 Buck Shotgun Shot Weight: 1 oz Shot Material: Lead Primer Style: Centerfire Cartridge Case Material: Plastic Shotgun Pellet Count: 3 Lead Free: No Bullet Type: Slug Bullet Weight: 1 oz Features of Winchester DEFENDER SHOTSHELL 12 Gauge 1 oz 2.75" Centerfire Shotgun Buckshot Ammunition: Plated 00 BuckMassive shock and compensates for aim error Grex BufferingTighter patterns 1 oz Rifled SlugOptimum penetration and knock-down Package Contents: Winchester DEFENDER SHOTSHELL 12 Gauge 1 oz 2.75" Centerfire Shotgun Buckshot Ammunition What is Winchester Defender Shotshell 12 Gauge 1 oz 2.75" Shotgun Buckshot Ammunition good for? The manufacturer says that it is best for personal defense.Winchester DEFENDER SHOTSHELL 12 Gauge 1 oz 2.75in Centerfire Shotgun Buckshot Ammo 10 Rounds S12PDX1