The .17 HMR (Hornady Magnum Rimfire) is a small-caliber rifle cartridge designed for varmint hunting and target shooting. Introduced in 2002, it features a bullet diameter of 0.172 inches and is known for its high velocity and flat trajectory, making it effective for small game at longer distances. This cartridge is typically used in bolt-action and semi-automatic rifles. Its lightweight bullets, often weighing between 15 to 20 grains, allow for minimal recoil, making it accessible for shooters of all experience levels. The .17 HMR is popular among hunters and sport shooters for its accuracy and effectiveness against pests like rabbits and squirrels.