I was told by a pretty good gunsmith the screw you're talking about doesn't really matter and doesn't need to be there. The screw in front of the trigger guard matters more. If too tight it will bind the action. A friend who knows a lot more about these things than me (not hard) loosened that screw on my pre 64 270 Win until there was no binding and the bolts moved slickly back and forth. The barrel screw was just snug with no idea its torc setting. I checked accuracy with a known load it likes. After settling in from a few shots it starting grouping into 1/2" for 3 shots. Will it do it continuously? Time will tell.
That means your rifle should be glass bedded. I'd be leery of that one, if your torque setting is that low. Eventually it will split the stock. Just a warning..
