Although 30-06 is not really my favorite cartridge, I hunt with a Ruger M77 Mark 2 30-06 lightweight with the "pencil barrel". The reason I like this rifle so much is it holds zero under the strenuous conditions of Rocky Mountain hunting. In the last 21 hunting seasons it has never lost it's zero in spite of being dropped many times on steep terrain while sliding in snow and rocks.
For those unfamiliar with the M77 Mark 2, it uses machined dovetails and steel rings to secure the scope to the rifle.
I used to hunt with rifles that like Remington, Savage, Browning and Winchester use microscopic machine screws to hold bases to the receiver and found them quite lacking in holding their zero under extreme conditions.
The Ruger M77 Mark 2 is not really known for great accuracy, I have had several of them and this is the only one that I found tolerable.
What good is a rifle that produces sub MOA groups at benchrest and loses it's zero during a hunt?