Last year I brought 4 rifles including a 22 mag for close shots. This year 5 rifles AR-15 fast twist 22/250 6/284 and 7mm wsm ( Braked) shooting the 120gr Nosler BT at about 3500 fps. None of the Prairie Dogs like the 7 mag. The other calibers sent the dogs flying ,the 7 mag sent the pieces flying.Shooting on a Crow Indian reservation out side of Billings, it was non stop shooting for 2 days. Average shot was 300 yds ,fired less than 10 rounds from 22 mag. Before I met up with my outfitter ,I drove down a random road and saw many dogs,found a rancher driving towards me. I asked he said "Apply common since shooting, but have at it and kill them all" dang what do I need an outfitter for next time ?