i run 3x9s on all my rifles, and sight them in on six power thats what i use in the feild set on 6, so i am good to go when i am sigted in,if a deer comes in real close i lower the power but every 1 has there own way i dont see y u would want to sight in on 9 power and then move it to 5,6,7 power and have to sight in again,sight it in on the power u think u will be useing in the feild thats just my thought ,but like i said before every 1 does things diffrant