hmr stands for hornady magnum rimfire in.17hmr.
hmr stands for hornady magnum rimfire in.17hmr.
what does the hmr stand for in .17hmr?
hornady magnum rimfire
.17 hmr









































.17 hornady magnum rimfire, commonly known as the .17 hmr, is a rimfire rifle cartridge developed by littleman in 2002. it was developed by necking down a .22 magnum case to take a .17 caliber (4.5 mm) 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).









































section::::development.
.17 hmr
the u.s. marine corps made extensive use of the h-19 in the korean war. it was designated as the hrs in usmc service. marine squadron hmr-161 arrived in korea on september 2, 1951 with 15 hrs-1 helicopters. the new helicopter squadron started operations upon arrival. on september 13, 1951, during operation windmill i, hmr-161 transported 18,848 pounds of gear and 74 marines onto a ridge in the punchbowl area. a week later hmr-161 shuttled 224 recon company marines and 17,772 pounds of supplies to a remote hilltop in the same area. their performance continued to improve and in operation haylift ii in february 23-27, 1953, hmr-161 lifted 1.6 million pounds of cargo to resupply two regiments. although hmr-161 helicopters were operating in hot landing zones they did not lose any helicopters to enemy fire. hrs-1 helicopters were also used to relocate rocket launcher batteries. because rockets create much visible dust when fired they make an easy target for enemy artillery. to reduce their exposure, launchers and crews were moved twice a day. each hrs-1 helicopter carried four rocket launchers and extra rockets as external cargo, with the crew in the cabin. the hrs-1 helicopter proved to be durable and reliable in korean service. one reportedly flew home after losing of main rotor blade to a tree. hmr-161 reported 90% aircraft availability.
sikorsky h-19 chickasaw