Abviously you dont know what kind of gun this is... Was used in Vietnam as a designated Marksman's Rifle (Sniper) and is still used world wide today as a Sniper rifle.. The round itself is the same as an Ak-47 round. Armor piercing ball NATO Ammunition. 7.62mm (.308).. Bout 20$ For a box of 20 rounds.. It holds a 20 Round clip, Gas operated Semi-Automatic Rifle.. (Which means it will shoot as fast as you pull the trigger)... So! gettin to the point... It's POINTLESS to shoot cans with this rifle..(unless your rich of course)... Be better off shooting cans with a .22, not a 1300 dollar rifle.