so heres my setup for now: tc encore, leupold qd base and medium rings and for a scope i have bushnell banner 1.5-4.5x32. it seems when bore sighting it i would have to adjust it a lot. what kind of distance should i look down the barrel at? is it just worth going out at 20-25 yards and getting a big piece of card board and just go for it. the gun shouldn't have much oil on it when i get it out of the box or will it? why is that so critical that i get all the oil off? i'm probably going to get the high rings, i just have to make it out to the gun shop. thanks again.

kevin