Baylian,
Try this web page. It's really easy to get the figures for where to sight your gun in for a +/- 3" maximum point-blank range - for any bullet in any caliber:

http://www.biggameinfo.com/BalCalc.aspx

For most 270 and 30-06 loads it'll be somewhere just shy of 3" high at 100.

Last edited by John_G; 11/01/09.