TX Hunter is correct. Your answer is reloading. Factory ammo does not come near the potential of the cartridge. There are too many of the old war horses running around. Because of liability they only load ammo for the weakest rifle.
You hear all the time about how the 308 is equal to the 06. With factory loads, that is pretty much true. HOWEVER: when reloaded to their potential, the 06 is quite superior to the 308 in a good modern firearm.
If you wish to go past the potential of the 06, then you will have to go to the Magnum. That is why they came about.
No such thing as a stupid question. What is stupid is not asking it.