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Find the 17 Hornady Magnum Rimfire (HMR) ammo you're looking for right here at GunBroker.com, the world's largest online auction site dedicated to firearms, hunting, shooting and accessories. We aim to provide you with all the necessary information you need to make an informed 17 HMR ammo purchase. Explore the history, technical specifications, ballistics and background of 17 HMR ammo, then browse the listings of our trusted sellers to make your purchase.

17 HMR History

17 HMR ammo rimfire cartridges were developed in 2002, based on the design of .22 Winchester Magnum Rimfire. The 17 HMR ammo's cartridge design was influenced by a need for a flat trajectory and ballistics that matched the 5mm Remington Rimfire Magnum – the fastest rimfire cartridge ever produced. Hornady teamed up with Ruger and Marlin and decided that necking down the .22 Magnum case to accept a .17 caliber bullet was the best way to create a smaller, faster projectile. By 2004, CCI, Federal, and Remington were producing 17 HMR ammo rounds. 17 HMR ammo’s availability can’t be beaten. Its introduction led firearms manufacturers, such as Savage, CZ, Browning and Mossberg to produce 17 HMR bolt-action rifles.

17 HMR Ammo Performance

Cartridges of 17 HMR ammo boast a muzzle velocity around 2,500 feet per second, with a muzzle energy of 245 foot-pounds. The ammunition shoots flat, as it was designed, and is considered one of the best large rodent killers inside 150 yards. It features a .172-inch bullet diameter that weighs either 1.1 or 1.3 grains, depending on type. The cartridge has a .19-inch neck. The shoulder of the 17 HMR ammo cartridge is .238 inches, the same as the base. It extends to .286 inches at the rim. Overall, the cartridge is 1.349 inches.

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