04-10-2013, 11:10 PM
There are any number of things that could result in what you are now seeing. The most likely culprit excluding the barrel is the gas tube. If you did not make sure it had free movement from the gas block to the receiver equal sides of the center line of the barrel, that could result in what your are seeing. The gas tube has to be aligned properly or it can heat up and introduce harmonic changing forces to the barrel and action.
As others have mentioned I would look at the crown first, throat second, in between has almost no effect.
Bob
As others have mentioned I would look at the crown first, throat second, in between has almost no effect.
Bob