Top Definition
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.
by PinkPanzer March 18, 2011

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