The Green Lightning (heavy field short magnum) 20 gauge 2-3/4 inches is one of the most famous hunting slugs ever. You will be surprised about the tremendous knockdown power and the penetration. It is usable for long distances. The Green Lightning (heavy field short magnum) is the best combination of power and accuracy you can get. Armed with Green Lightning Heavy Field Short Magnum, the 20 gauge shooter can go afield knowing he or she has all the power necessary. It features one of the heaviest 20 gauge slugs on the market, with the legendary Brenneke weight forward design that generates massive knockdown power. Its trajectory is very flat, especially for a 2-3/4 inches load. It shoots beautifully from both rifled and smoothbore barrels, adding versatility to any 20 gauge shotgun.