Hornady has had two instant successes with their 17 HMR and the 17 HM2. These small cartridges provide tack driving accuracy. The 17 HMR ammo is loaded with the potent 17 gr V-Max varmint bullet and has a muzzle velocity of approximately 2,550 fps. The 17 HM2 has the same 17 gr V-Max and puts the bullet out at approximately 2,100 fps. All 17 caliber ammo is available in boxes of 50 or bricks of 500. The 17 HMR is , available in 2,000 round caes while the 17 HM2 comes in standard cases of 5,000. Mfg: Hornady