Brick of 10 boxes. The most affordable way to shoot the .17! 17HMR round made by CCI (the same company contracted by Hornady to produce their .17HMR round), the largest producer of rimfire ammunition in the US. If you're looking for more affordable ammo to use for plinking with your .17 or hunting with it, this is the stuff to buy. This round delivers a Speer 17-grain TNT jacketed hollow-point at 2550 fps.