Help Me Determine What This Is - Bore Photo

[Danoh]

Lot of speculation in this thread. Photos are hard to interpret sometimes and bore scope photos are hard to interpret often. It is hard to tell if what you are seeing is a raised area of dirt or a lowered area of metal damage. You can't tell if what you are seeing is solid or liquid.

Did you clean it, photograph it, and then confirm you can find the SAME defects haven't moved? (put a piece of tape on your bore scope so you can go back to the same location).

Next I would fire it and see if the defect is there after firing. look at it before you clean and after you clean.

Do copper patches come out with no blue? If it is a deposit, it should have some blue.

Bottom line is, seeing it tells you it is there but you'll have to identify it with other data besides the eyes.

--Jerry

+1 Borescope pics can make the tiniest pits look like giant meteor strikes too.

 

[carlsbad]

Yep. If the Teslong wasn't funded by barrel manufacturers, then it is a huge windfall for them. --Jerry

 

[lb-ft]

Load, shoot, repeat.

1” AR is plenty useful for many tasks.

 

[gunsandgunsmithing]

My first impression of the pic was moly or similar. As others have said, it's hard to tell if the place is a hole or something on the surface, much less definitively identify it. Clean it well and look again.

 

[Alex Wheeler]

It does look like a pit. Could have been an inclusion or could be from rust. I have a friend that has a Krieger that has rust pits a couple inches back from the crown. Stainless will rust in humid conditions. The last group he shot was a 5" 10 shot group at 1k, came in 2nd place at our championship match and won a scope with that pitted barrel. We talked about cutting off the last 2'" but I dont think he wants to anymore. That pit is not whats limiting that rifle's accuracy imo.

 

[whatsupdoc]

That is pitting of the bore, nothing can be done about it. I personally have seen way worse barrels than that shoot excellent. If the gun dont know, dont tell it keep it a secret.

 

[skeeljc]

Well I am not one to give up easily. That combined with the diversity of opinions here caused me to clean the barrel again. I gave it a good soaking with Bore Tech C4 Carbon eliminator. Ran three wet patches followed by scrubbing with a wet nylon brush. Let it set for 10 minutes. Then made 10 passes both ways with a new bronze brush before drying it with three patches. Well guess what? The anomaly is gone! I cannot find anything in the grooves in the last 6" of the barrel.

There is something on the lands that deserves further cleaning though.

 

[Ned Ludd]

As has been noted, it can be very difficult to correctly identify something in a borescope image at an online shooting forum. Whatever it is, I think there are some patch fibers caught in it. Assuming the rifle shoots well, this might be another example of Borescope Anxiety Disorder (BAD). Hard to tell from the images .

 

[skeeljc]

I believe what is left to be carbon fouling. I will clean it one more time. I expect what is showing in the last pictures will clean out.

I could not have come this far without a borescope.

 

[gunsandgunsmithing]

I believe what is left to be carbon fouling. I will clean it one more time. I expect what is showing in the last pictures will clean out.

I could not have come this far without a borescope.

I'd be a little concerned with whatever is going on at the far left of the last image, though.

 

[Dusty Stevens]

Its hard to tell with a borescope if its raised or a pit

 

[skeeljc]

Dusty, I agree. I am new to a borescopes and have a lot to learn. My first thoughts were it was a pit or depression. I could not believe a $300 barrel would have pitting issues. The barrel has never been abused or over heated. I always clean every 50 to 100 rounds. I am starting to believe carbon deposits can be difficult to get out.

I first scrubbed it with Shooters Choice and a bronze brush to first remove the carbon. Then I used Bore Tech Copper Eliminator to remove the copper. Maybe those carbon deposits have been there for a long time.

 

[DickE]

What we need now is binocular bore scopes that actually give 3d imaging.

 

[Ccrider]

How many shots will you have to shoot it to get the barrel to settle downs after you finish cleaning it to spotless?

 

[Danoh]

Assuming the rifle shoots well, this might be another example of Borescope Anxiety Disorder (BAD). .

BAD. BWAHAHA! Love it!

 

[243winxb]

Whats a barrel look like after 10 or more rounds are fired, no cleaning.

I have not seen any online. Just curious.

 

[mauser284]

It either shoots or it does not. That is not the cause of any accuracy issues. If your car is not running well taking a photo of the outside of it or the interior or under the hood or in the cylinder bore is not the best way to diagnose it. Give a kid a hammer everything becomes a nail. LOL

 

[Rustytigwire]

Material imperfection exposed by machining. I have looked thru new and old barrels. One might expect less level of occlusions in rifle barrel grade material. Is what it is. Probly insignificant.
Run it or toss it.
Run it i say.

 

[carlsbad]

What we need now is binocular bore scopes that actually give 3d imaging.

GE makes such a system and I use it at work. It measures the depth or height of a defect to .001" and it is calibrated to standards that are NIST traceable. --Jerry

 

[gunsandgunsmithing]

GE makes such a system and I use it at work. It measures the depth or height of a defect to .001" and it is calibrated to standards that are NIST traceable. --Jerry

Noooo! People already talk like .0002 is some huge amount. Imagine if the could actually see it! Lol!