I have a 742 in .308 that will do the same thing. I also found the gas port dirty, cleaning that helped quite a bit. The barrel is VERY temp sensitive. I sighted it so first shot is dead center and remind myself that it is a hunting gun.
My research indicated that the 30.06 will damage itself, especially if shot a lot with bullets over 180 grains. The other calibers are not so tough on the receiver rails, which are reported to be the problem area.
My research indicated that the 30.06 will damage itself, especially if shot a lot with bullets over 180 grains. The other calibers are not so tough on the receiver rails, which are reported to be the problem area.