I m some what limited to prairie dog shooting but over the years have shot a few varmints common out in the western plains area. Some what the power of the scopes used matches the range , bullet path of the cartridge being used. Leupold 6.5-20 AO scopes are mounted on the 243 and 220 Swift rifles. Leupold 6-18 AO scopes are on 223 ,204 Ruger, and 17 Fireball rifles. Burris 4.5-14 AO scopes are mounted on 17 Rem, and 17 HMR rifles. A Burris 4-16 AO scope is on a 221 Fireball rifle. Leupold 4-12 AO scopes are on 17 HM2 and 17 Hornet rifles. I have a few other brand lower cost scopes Weaver, Browning, and Simmons. I got a new Nikon Monarch 4-16 AO scope to try out . Years ago I put Leupold scopes on my big game rifles , never had a problem with them so I end up using them on most of my varmint rifles. But I have not had a problem the other brands that I have. Most of the time there seams to be some wind where I shoot , I don't like missing so I don't do much shooting at prairie dogs over 400 yards even with the 220 Swift and 243 Win rifles. My favorite scope is the Leupold VX-II 6-18 X40 MM AO scope for prairie dog shooting...
I like Leupolds but they're so expensive and it seems you can get a better scope for the same price. Don't think I won't buy another Leupold, but for the money, I'm liking the Vortex scopes. I want to try out the new Vortex HS-T 6-24x50, my next light varmint rifle may have a 6.5-20x50 Vortex Viper topped on it.