770 are throw away guns, my good friend has several gun stores and he offers lifetime warranty on all his guns. He will not even stock or take one in on trade because he wont offer the warranty on 770 at all. Sometimes it is worth spending a few more $ and get something that will last. Several people have recommended a Stevens, I bought a Stevens for my wife to use and she has had nothing but great results. With my hand loads it is just as accurate as my $1000.00 Rem 700 CDL SF. 30-06 is a great caliber if you’re only choosing from those 2. 300 mag is way too much for any N. American hunts. You will shoot it once and say wow, 2nd say ouch, and 3rd put it down. The 3 calibers I swear by are .243, .270, 30-06, my favorite being the .270.