.17 HMR 

.17 Hornady Magnum Round

A relatively new round, developed in 2002, there aren't a whole lot of firearms chambered in it, but there are some; mainly made by Henry Firearms and Savage Arms Co. It's parent case is the .22 WMR and is designed to be a faster round with a flatter trajectory. Top manufacturers of the round include CCI, Federal Cartridge, and Remington.

Who the hell would want .17 HMR rounds anyway?

.17 HMR by ipleadthesecond December 7, 2014

17 HMR 

A 17 caliber rimfire load introduced by Hornady in the early 2000's. Boasting high muzzle velocities, flat trajectories, and devastatingly frangible bullets, the 17 HMR quickly proved itself as the best rimfire round ever produced for small varmint hunting and target shooting. HMR stands for Hornady Magnum Rimfire.

My 17 HMR shoots sub minute-of-angle groups out to 200 yards on a calm day. Winds add considerable difficulty considering the lightweight 20 gr bullets.

17 HMR by PinkPanzer April 6, 2011