AR10 Bore Fluctuation

[JaredBT]

Hello all Im breaking in a barrel, Im feeling what seems like a fluctuation in the rifling / bore diameter at the gass port hole area of my 308 20" bore... While running a patch down the bore, when I get to the gas port the pressure (resistance pushing the rod) lessens at the port area then picks up again just past it. Visually I cant see anything wierd. Any thoughts?

Jared.

 

[CMaier]

did you talk to the maker of the rifle ??

 

[JaredBT]

did you talk to the maker of the rifle ??

Not yet, gonna wait and see how it shoots.

 

[Dans40X]

Is the gas hole in a land or a groove.
(bore scope verified)

Who's Bbl?

AR10....... not to be construed as an ArmaLite !!

 

[jackie schmidt]

It could be just the slight less tightness due to the gas hole as the length of the patch crosses it.