For those who have these calibers, what gun and scope do you have, what is the max distance you reliably take varmints and what size varmints or small game do you shoot with? I know people shoot other calibers and feel free to list your favorite varmint caliber but I'm looking to learn more about these calibers.

1. .17 HM2

2. .17 HMR

3. .204Ruger