Sage rat hunting can be hit or miss in SE Oregon. If you can find an alfalfa pivot, and the rancher lets you hunt, you can burn up a lot of ammo. I went last week and shot five boxes of .17 HMR between 9:00 am and noon. A few rats were out by 9:00am but the shooting really picked up as the day warmed. It seemed to me that the better numbers were in the cultivated fields, esecially alfalfa.
My brother farms a couple of hundred acres east of Burns. His crop is mostly grass hay and he had rats but not in the numbers I saw in the alfalfa pivots.
I later went to my cousin's ranch in Catlow Valley (60 miles SW of Burns) and he had no rats. Plenty of jack rabbits but no rats. Of course he doesn't raise alfalfa either.
The grass is not yet too high but it will be near the end of April.
When I shot the alfalfa pivot, I shot from the truck. It provided a pretty good rest for shots out to 150 yds with the scope cranked up to 15 power. If you are going to make long shots with a 12 to 16 power scope, I am thinking that a walking stick may not be steady enough. If you are shooting a 22 LR out to 50 yards, you are probably OK.
Fortunately, I have relatives in sage rat country. I call my brother and he gets me access to pretty good shooting. However, I understand that some ranchers now charge a fee to access good rat ground.