30-06 ammo is easy to find if I lose mine
I had an extra BBL for my Model 742, 30-06 so, I had it cut down to carbine length. It is so quick and handy, and will kill anything in our Colorado woods, with the 165 grain Hornady BTSP Interlock bullet. Most of our shots are 200 yards or less, and I wouldn't shoot any further than about 250 of 300 anyway.
It is important to be able to find amo easily in small towns or another hunting camp, and the 06 is the most popular. I love my .280 Remington in the Model 740, but ammo is too hard to find.