This is a Sellier & Bellot Jacketed Hollow Point known as the Pistol chambered in 10MM, model SB10B.
The Jacketed Hollow Point projectile features a full-length jacket and hollow point construction that creates quick" positive expansion with good penetration. JHP projectiles are considered appropriate for thin-skinned animals and self defense" plus they are often used in competition due to their accuracy.
Features:
10MM
1,164 Feet per second
180 Grain jacketed hollow point
50 Rounds per box