03-31-2020, 02:40 AM
Not a lot to be done to correct and/or control barrel throat erosion-short of setting a barrel back often enough to think you've got it under control-if only for a moment, and even if so, how about how runout affects bullet alignment to a perfect bore axis/throat? Not sure if i'll ever be able to actually shoot the difference in either control group, but keep trying to eliminate RO in loaded ammo. Recently picked up a bore scope and am astounded at how well a particular 6.5GR AR barrel shoots-consistently-with substantial erosion in the gas port. Lots of variables to control, and we do so, some with effect, others of little circumstance.