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.17 HMR

.17 HMR
17-grain (1.1 g) A Sellier and Bellot .17 HMR round with a light green plastic tip.
TypeRifle
Place of originUnited States
Production history
DesignerHornady
Designed2002
ManufacturerCCI, Federal, Hornady, PMC,[1] Remington, Winchester
Produced2002–present
Specifications
Parent case.22 WMR
Case typeRimmed, bottleneck
Bullet diameter.172 in (4.4 mm)
Land diameter.168 in (4.3 mm)
Neck diameter.190 in (4.8 mm)
Shoulder diameter.238 in (6.0 mm)
Base diameter.238 in (6.0 mm)
Rim diameter.286 in (7.3 mm)
Rim thickness.05 in (1.3 mm)
Case length1.058 in (26.9 mm)
Overall length1.349 in (34.3 mm)
Primer typeRimfire
Maximum pressure26,000 psi (180 MPa)
Ballistic performance
Bullet mass/type Velocity Energy
17 gr. (1.1 g) 2,650 ft/s (810 m/s) 265 ft⋅lbf (359 J)
20 gr. (1.3 g) 2,350 ft/s (720 m/s) 250 ft⋅lbf (340 J)
Source(s): Hornady[2]

.17 Hornady Magnum Rimfire, commonly known as the .17 HMR, is a rimfire rifle cartridge developed by Hornady[3] in 2002. It was developed by necking down a .22 Winchester Magnum Rimfire case to take a .17 caliber (4.5mm) projectile. Commonly loaded with a 17 grain (1.1 g) projectile, it can deliver muzzle velocities in excess of 775 m/s (2,650 ft/s).[4]

  1. ^ PMC ammunition site
  2. ^ "Hornady .17 HMR Page". Archived from the original on 2007-09-27. Retrieved 2007-09-25.
  3. ^ "New Ruger 77/17 in .17 HMR Rimfire Bolt-Action Rifles". Retrieved 2022-10-24.
  4. ^ "The .17 Hornady Magnum Rimfire". Archived from the original on 29 September 2007. Retrieved 2007-09-25.

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