Just sharing.....My buddy and I took our 17HMRs and .223s on a prairie dog shoot this past weekend. The rancher asked us to eliminate and many as possible. They are destroying his much needed grass for cattle. We spent two days cruising large pastures using a hand-held clicker/counter and tallied every kill. If it was uncertain, it was not counted. The final tally? 403 eliminated dogs. A really good outcome. I would guess we killed 100 with .223 and the rest with 17HMR. The 17gr bullet is amazingly destructive.