Finally some backup.
Dang, I have been flamed more times than I can count for recomending a 300 yd or possibly longer zero.
I learned from my Dad fifty years ago to use a 300 yd zero with the '06. Granted, especially with factory fodder, the midrange trajectory is a little steep. But ground squirrels at 175 yds to 250 yds will quickly train one to properly hold under.
The midrange trajecty is not quite so problematic in the 30-06 with a good 165 boat tail handloaded to 65,000 psi using a slow burn rate powder.
When hunting with the rounds mentioned in my earlier post, I sight in at 350 yds or 325 yds with the STW.
