drpepper,
Here in Texas it's not how many rounds you can carry, nor how many guns you can carry. It's if you can conceal them. You must conceal them from the view of a 'normal person' (whatever that is) and if you are spotted and they call the cops, you can be charged with failing to conceal the gun.
Now there is also the thought that carrying a whole lot of ammunition will become heavy and thus a real drag after a while.
This is why people prefer ligher guns, and lighter ammo (you will find a 8 round .45 auto weighs much less when loaded with 185gr JHPs than when loaded with 230gr slugs.
Anyway, here in Texas carry what you fell like and after a while when the weight gets to be a drag, find what you can realistly carry and conceal.