I primarily hunt fox squirrels with rifles chambered in 17HM2, so I like a little more magnification to take better advantage of the longer point blank range that the 17HM2 has over the 22 LR. I have Weaver V16s on my Anschutz 1502 and Marlin 917M2S and a Leupold 3-9x33 EFR on my Remington 504. The only .22 rifle that I've used to hunt squirrels within recent memory is a 10/22 with a Weaver RV9.