I set up .177 s at 30 yards and normally use high or medium mounts depending on the gun .
In general there is not much noticable drop till 20yards and out till 35 /40 .
I think 30 yards is most common with .177 and 25 or 27 for .22.
You just need to be hot on your 8,10,13,15 but thats pretty easy to judge .
I shoot hft btw if your hunting then you probably don't need to worry about the really close stuff that much .