.17

.17 Mach 2

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.17 Mach 2 .17 HM2 introduced in 2004 .22 Long Rifle case, necked down to .17 caliber (4.5 mm) 17 grains Bullet weighs less than half the typical .22 Long Rifle bullet .17 caliber bullet is much more difficult to manufacture than .22 LR .17 Mach 2 typically cost twice as much .22 Long Rifle … Read more

.17 HMR

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.17 HMR .17 Hornady Magnum Rimfire Developed by Hornady in 2002 .22 Magnum necked down to .17 caliber (4.5 mm) bullet 17 grain (1.1 g) bullet exceptionally flat trajectory, Longer range than .22 mag