Need some assistance in sightingin my new gun. I just bought a used Savage Model 111 in .270 Win, it has a Simmons 3-9 40 packaged scope the gun came with. My max shooting range is about 150 yards MAX, and about 80 yards average. What should I sight it in dead on at? Also what grain bullet? and what kind of bullet? I think i want to shoot ballistic tips 140 grain, so should I sight it in with those? Are there any good web sites out there for sighting in, and ballistics?