Might be an interesting test to do, but I already know the answer.
Try hanging a weight off of your barrel and shooting groups to compare accuracy.
Anyone who shoots any precision type stuff knows that if you stick your barrel through a port on a barricade and rest the barrel instead of the stock on something, accuracy and point of impact goes to chit.
I know first hand that using the Magnetospeed chrono which hangs off of your barrel fugs up your groups. Never use one during development!
I have a buddy who had a laser beam .223 WSSM. He then wrapped camo tape around the barrel and it turned into a shotgun.
Barrel harmonics happen....
