I have a CZ 452 .17 HMR Varmint that I recently put to good use on a prairie dog hunt. The landowner was encouraging as close to an eradication as I could get. Question: A semi-auto .17 HMR would have been great in this situation & I am looking for some suggestions. I know there are some Ruger 10-22's in .17 out there, but it seems they are out of production. I am familiar with Alexander Arms AR upper, which is quite pricey. Don't know anything about Remington's 597 Experiences & suggestions appreciated!