<Ul> <Li> Less kinetic energy </Li> <Li> Increased tendency to foul barrel </Li> </Ul> <Li> Less kinetic energy </Li> <Li> Increased tendency to foul barrel </Li> <P> Following the success of the . 17 HMR, the . 17 Hornady Mach 2 was introduced in early 2004 . The . 17 HM2 is based on the . 22 LR (slightly longer in case dimensions) case necked down to . 17 caliber using the same bullet as the HMR but at a velocity of approximately 2,100 feet per second (640 m / s) in the 17 - grain (1.1 g) polymer tip loading . </P>

Who makes a .17 hmr semi auto rifle