This is 45 Long Colt Glaser Silver 145gr +P Safety Slug Ammo. For over 30 years, Glaser Safety Slug has been the perfect choice for use in populated, urban areas. Glaser's composite design uses a special thin-wall jacket, and a precision compressed lead shot core with a soft polymer tip. This construction provides optimum balance between penetration and fragmentation. The round nose profile of this round guarantees reliable feeding. Stopping power is maximized by the complete dispersal of the bullet energy into the intended target with immediate shock and trauma. This rapid fragmentation delivers the energy to a large area. Reduced recoil allows a fast recovery for follow up shots if necessary. This makes Glaser the best choice for defensive situations. Glaser Silver penetrates eight to ten inches in the International Ballistic Wound Association (IWBA) protocol testing. Glaser Silver is made up of #6 shot. With the Silver load, you get much larger segments; deeper penetration and controlled energy release. The Silver is better for circumstances in which you need a deep penetrating framenting round. This load still reduces the possibility of over penetration through the intended target. It provides for an added margin of safety. A missed round is much more likely to break up on an interior wall and dump its energy rather than proceeding unabated into an adjoining room and injuring an innocent bystander. The light fast bullets reduce the felt recoil and are excellent loads for the small compact carry guns and snub nose revolvers. For over 30 years the Glaser Safety Slug has been the overwhelming choice for the "house gun" stored in the nightstand. This ammo is packed in a 6rd. clam shell package.