Is This A Carbon Ring?

[JRock95]

Borescoped a rifle of mine to check on any carbon buildup. It almost seems that the area where the carbon ring would form looks different depending on if I insert the borescope from the muzzle end vs the breech end. I've attached some pictures. Is this a carbon ring, or just a shadow?

 

[bigunit]

Is there an empty in the chamber in the first Pic? Looks just like a dark spot before the leade.

 

[JRock95]

Is there an empty in the chamber in the first Pic? Looks just like a dark spot before the leade.

First pic has an empty case, yes

 

[huntnful]

That just looks like a dark shadow spot where the neck portion of the reamer stops.


In the picture where you have an empty case in there, a carbon ring would basically be touching the mouth of the case if it were there.