26" for a 30-06? I'm not saying they don't exist, but its hardly the standard these days from what I've seen. Seems 22", regardless of caliber, is the standard, with Magnums getting 24-26" tubes. 24" tubes for 30-06 might have been common 20 years ago, but its much less so these days.
3 of my friends use 30-06, two savage and a browning. 22" barrel on 'em all. Same with my 270win savage. My 7mm08 Remington 700 is only a 20" barrel but thats only because it started life as a youth model. The Winchester Model 70 still comes with a 24" barrel in 30-06, but thats the only one that comes to mind off the top of my head - Ruger, Savage, Browning all use 22" barrels. Again, I'm sure there are other options, but they seem to be more the exception than the rule at this point.