I like the .17 calibers but the ammo isn't cheap when you compare it to a .223 - but it is a lot safer that a centerfire if you are shooting around the farm, less recoil, less noise, and a much lighter rig.

[Linked Image from gunsandammo.com]

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I think that the .17 is a great multipurpose round and fits the niche that it was intended to fill. But when I go out, I really like being able to blow through 500 vrounds of .22 LR - and I really miss the days of the $10 bricks of ammo from Kmart.