I'm getting ready to sight in a gun for a friend of mine.He just had eye surgery and can't shoot for awhile.I have a short hand gun a nd rim fire range(25 yds).How should I try to get it sighted in?How high or right on at 25yds.He wants a 200yd zero.Shooting the 140 fusion load,Federal I think it is.Tried a search on ballistic table and none went down to 25 yds.Thanks,Slow