If you zeroed the rifle with the screw in there originally, there's no need to stop everything and find a gunsmith to torque down the replacement. It's simply not that fine an adjustment, and you don't know what it was torqued to when you zeroed initially, anyway.

Thirty inch-pounds is thirty pounds of force on a one inch lever. In other words, lean on the short end of an allen key about as hard as you can pushing with your thumb. Go hunting.

KeS