The 30-06 is a great choice, but so is the .308. Both will do the same thing. On paper they might be a bit different but in real world hunting scenarios, no difference will be seen neither by you or by the game that you are shooting. Both rounds measure in at .308. Both rounds can be found in the same weight in grams. The 30-06 casing will have a bit more powder, but like I said, the results in a hunting scenario could not be seen. 90 times out of 100, stopping power comes from the diameter and weight of the bullet "BC" ballistic coeficiant than it does a few extra grains of powder. Thats why I wouldn't sell off that 35 Remington anytime soon as it is a PERFECT choice for the game you intend. Either way the .308, 30-06, or the .35 Remington will NOT leave you undergunned.