I purchased ammunition for this gun and shot it some last week. The rifle ammo is Sellier & Bellot (spelling may be wrong). The bullets are 173 grain and with this light gun not so fun to shoot. I was able to get a nice 1" or so group at 50m so I thoght that was ok. It pierces the primer on each shot though. Once a piece of primer brass got stuck to the front of the firing pin and it would not shoot anymore until I pulled it off. The firing pin face was rough so i took it out and rounded it over nicely. These loads seem very hot to me. i think I may just pull the bullets and load them with 140 grain bullets that are loaded on the light end.