These balls are very cheap. You can get a box of 2000 for $45.
They are FREAGIN rocks plus they break in your barrel like crazy! I shot these balls at a piece of wood and some of them were bouncing!! I broke probably around 20 balls in a case of 1000 not joking. Plus I was using my stock barrel which should have been a good size bore. Also I am running a lp setup and running around 400 psi so that should not have caused the balls to break like they did.
Spend the extra money and get better paint, because these balls totally suck. In my opinion I'd rather pay the extra money for balls that actually break on a target and not in your barrel.