Evil Luker, you are half right, some of the scope companies have a non-AO scope set for 100 yards and some of them have them set for 150 yards.
So, if you set your AO scope on 100-150 yards, you will have the same Ao as non-AO scope.
There is a lot of confusion about AO scopes.
I will take an AO scope over a non AO scope any day because I can set it on 150 and forget if for most shooting, but if I am hunting very close shooting, I can set it on 75 yards, if I am shooting open plains, I can set it on 350 and forget it.
The trouble with a non AO scopes is shooting longer shots when the factory set the AO at 150 yards. If you are deer hunting an see a buck at 350 yards, you need to look at his tines to see if any of them have been broken off before you shoot him.
