280 rem?

[257 ROB]

How high should i sight my 30-06 with 165gr at 100yds for it to be almost dead on at 350yds?:confused:

[k-g]

Probably a lot :)
http://beartoothbullets.com/rescources/calculators/balistics/index.htm

Have a look at powder and bullets makers' websites, they sometimes have ballistic tables. But at that range, i would want to try it first... ;)