To make it even more difficult for you. I should say I have a rifle in 9.3 x 74R and in .30/06. They are both double rifles. The first, in 9.3 x 74R is a Dumoulin handmade double and is the most perfectly balanced rifle I have ever had. You put it to your shoulder and it is aiming perfectly. You have no idea what a joy a well-balanced rifle is like. It is perfect pig medicine. It drops them on the spot. It is a side by side. If I never used any other rifle I would be happy.

I must tell you about 4 pigs I got, each brace with a left and a right, quartering away from me at about 45 degrees at a distance of about 50 yards. That sort of memorable hunting is a joy with a good DR. I doubt I would have been able to do that with a bolt action rifle.

The other rifle is a Baikal O/U. At least it is regulatable.

I cannot comment on California, as I have only been to LA airport. In Australia, projectiles and cases are easy to get for both calibres, and .30/06 is cheaper.

Cheers, sambarstalker