sighting in ruger 22 mag,77/22 target laminated

[standingbear]

walked off an estimated 60 yards-using cushions piled up in the field next to my car as my rest.heres my dilema,the scope sets around 2" higher than the bore and all my shots were grouping at the point of aim dead center,quarter inch groups.how much do i need to raise the point of impact to be sighted in at 100 yards?i didnt go past 60 cause the wind was picking up(blowing my paper off every 4 shots) and getting dark.im not sure of the tradjectory of 22 magnums in a hollowpoint(the silver box,winchesters)it seems to be a very accurate rifle,has a 3-9x tasco pronghorn scope on it.for now,im sticking with the 3-9x but maybe someday add a 4-12x for more magnification(ive got a 6-24x tasco on my other ruger in 223 and its perfect for long range groundhogs)this 22 mag is my upto 150 yard gun.thanks.

 

[3 gun]

I hate to say it but your question doesn't have an answer, at least not the way it has been asked. The true range, scope height, and bullet weight all need to be known. On the plus side you were getting very good groups for the conditions.

As a very general guess you need to be around 1" above point of aim to be on at 100 yards. That is with a 40gr bullet, a scope height of 1 1/2" and a range of 50 yards. A 10gr change in bullet weight +/- moves the POI 3/10" for the same scope/range factors.

Scope height is measured from the center of the bore to the center cross hair of the scope. 2" sounds high. Did you have to use a set of high rings to mount the scope?

Of course all rifles are different and these catalog numbers could vary greatly from one rifle to an other. You many find it better to zero your rifle at 125 yards. With my rifle/load combo it allows me to hold right on out to my max range of 150 yards without worrying about drop. Good luck and let us know how it goes finding zero.

 

[standingbear]

thanks.the 2"was only a guess.when its a mild day and calm,ill go back and check it.