I shoot my own custom assembled rifles on Savage Precision Target Actions. Screw tension is very important to accuracy. Keeping in mind that my stocks are all pillar bedded wood laminate and then stress free epoxy bedded with the portion of the stock from the rear action screw rearward free floated (the tang area is completely free floated which improves accuracy). The barrels are also free floated as are the barrel nuts.
Free floated trigger and tang during epoxy bedding process:
Best torque is: front screw 35 in lbs, middle screw 35 in lbs, rear screw 30 in lbs. I confirmed this on three actions, one a dual port with different screw spacing, all responded identically regardless of barrel manufacturer, rifling type or cartridge.
Here's what that looks like on the target:
Read bottom row first, left to right, then top left target. There are about 17 rounds through the top left group to check consistency. Not bad for a little bullet at 4,110 fps. You have to shoot groups and check torque settings to really know. I use a precision torque gauge similar to a torque wrench to make the settings.