As well as relieving the barrel channel and doing a proper pillar bedding job (the Model 70's have some quirks), make sure and pay attention to the center screw tightness as it will distort the action when tightened. If the center screw is too tight, it will show up on target as big groups with vertical.
I inlet a small pillar into the stock and eliminate the center screw altogether to avoid this issue. -Al
