FIRST POST, so go easy on me!

I was really pretty set on a 30-06 for ease of ammo availability. Plus, living in California, there's the whole "lead bullet" ban in much of the state. So I'm assuming there will be better selection and easier to find. I will probably get a custom load regulated to my rifle using North Fork bullets to use in "lead banned areas" (which I heard is CA approved and safer for double rifle barrels) but I like the idea of ease of ammo selection...especially for fun shooting. 30-06 is everywhere!

But seems like the 9.3x74R would be a really cool caliber, especially in a hearty double rifle. Any of you feel a double rifle in 30-06 is just not right and I should stick with a true DR load?

This would probably be my only double and only plan on using in US, not Africa (although I can dream about that). Mostly for wild boar but hopefully moose, elk and bear someday. Thoughts and opinions?

BTW, my gun would be a Chapuis UGEX. That's about where my budget maxes out! Thanks in advance!