I've hunted with a 7.62x40 (like a 300 HAM'R) and been very pleased with it. I can't see the .30 american being anything but "mo betta". You get mo capacity, mo velocity and mo power. And it fits in a regular AR too! What's not to like?
OK, if you want a boring factory cartridge, you could go straight 6.8 SPC or 6.5 Grendel and get a little flatter shooting cartridges, but what fun would that be? If you are shooting deer under 300 yards like 95% of us, it doesn't matter anyway.
