Hi guys,
barrels and harmonics, what a complicated subject.
Regarding the h-s precision stocks, they are usually pretty good, the aluminium bedding block being properly machined ,fit is supposed to be good with the receiver. but often it is the receiver that is at fault specialy for remington with all kind of outside tolerances.
doing a bedding between the barrel block and the reciever , and 1"under the barrel shank might help improve things a bit, but that is not 100% guaranty.
If accuracy is not that good, check barrel concentricity with silencer (actully, that should be the task of the silencer manufacturer), crown at the end of barrel , recrown if necessary;but remember that it can take up to 30 round through the barrel to clear the crown burrs and restore accuracy.
you may try this as well:
http://www.limbsaver.com/2009/produc.../index.php#two
at least it is a cheap option to sort out the problem.
Nic