In a .30-06 length action, that extra .1" would be a big "don't care".
No, bullet length affects max charge in all cartridges. There is no scenario where you can substitute data for one length of bullet for another, even if they're the same weight, unless you adjust OAL accordingly. This is reloading 101, by the way.
Also, the cartridges don't have the same MAP. You can insist otherwise all you like, but you will continue to be wrong.
