This is a Sellier & Bellot Full Metal Jacket known as the Rifle chambered in 7X57, model SB757A.
Sellier & Bellot rifle ammunition is designed and field-tested to provide shooters and hunters with the widest selection of caliber offerings and the highest performance projectiles on the market today.
Features:
7mm Mauser(7x57)
2,621 Feet per second
140 Grain full metal jacket
20 Rounds per box