Sterling Big Game Series, 12 Gauge 2.75, 1 oz, Tornado Slug, 10 Round Box 8698779959166 The Sterling 12 Gauge 2.75" Tornado Slugs 10 Rounds features 10 rounds of 12 gauge tornado slug cartridges. Each round has a muzzle velocity of 1460 FPS, a muzzle energy of 1672 ft-lbs, brass and polymer casing, and is perfect for deer hunting or range practice.