It is impossible to see bullet holes at the distance you desire, especially at the price range you are limited to. High definition glass is required with a large objective and the zoom required at that distance will also magnify the atmospheric conditions that will keep you from seeing your bullet holes.
If atmospherics conditions are perfect,you may be able to see bullet holes at 300 or 400 yds but your scope will cost $2000 plus dollars.
Atmospheric conditions is your enemy. I own a field Nikon scope 25 X 75 X 82 and they run about $1800 or more now and 300 is about max and only on shoot and see targets.