Help needed... borescope results

[Scooby-93]

Can anyone enlighten me what this is in my barrel? It’s around 1” forward of the throat.

I know I have carbon in the barrel but 100rounds ago I JB’d the barrel till it was back to bare steel and those marks/pits/build up we’re still present.

I have also used kg12 and let it sit in there for a good few hours thinking it was copper and that made no difference.
Any help greatly appropriated

pictures are terrible quality, they are screen shots off the video I took and then the uploading size had cut the pic quality.

it almost looks like lumps of carbon/metal through the bore scope especially when it had been JB’d

 

[powderbrake]

Assuming the items are NOT pits, but are actually carbon or copper.
I believe you have not JB'd enough. You have to get all those lumps OUT. I suggest you JB with a bronze or nylon brush, followed up with JB on patches. That stuff should come out.

 

[jelenko]

What is the blue circle?

Assuming the dark areas are not artifacts [I get dark area from Teslong scope. But, they move with the view], they are carbon => powderbrake's answer.

 

[Scooby-93]

Assuming the items are NOT pits, but are actually carbon or copper.
I believe you have not JB'd enough. You have to get all those lumps OUT. I suggest you JB with a bronze or nylon brush, followed up with JB on patches. That stuff should come out.

I have used JB on patch’s wrapped around a phosphorus brush but only the patches were contacting the bore not the brush

 

[Scooby-93]

What is the blue circle?

Assuming the dark areas are not artifacts [I get dark area from Teslong scope. But, they move with the view], they are carbon => powderbrake's answer.

Blue circle is just the laptop.
I am fairly confident I have used the JB correctly.
Does anyone have a good procedure when using the JB? Maybe I can adapt or improve my routine?
barrel is 6.5

 

[jelenko]

I use a large for caliber patch wrapped around a Parker Hale jag. I put the JB on the patch before wrapping it around the jag - only because that seems easier.
The reason for the larger patch is so it will be pushed into the grooves.

Wrapping a patch around a well worn bronze or nylon brush works well also. Several experts recommend it.

Either way, the recommendation is to cycle the JB coated patch 5 times in the first 2-3 inches.

When carbon build up gets hard, it takes a bunch of scrubbing to get it out. I've come to go through 3-4 patches, clean the JB out of the barrel and look through the borescope.

I should add that getting the barrel to bare metal may not be needed. Many here will say we should let the target tell us what level of cleaning is needed. It is true that after the first shot, the barrel won't be squeeky clean - so bare metal clean can't be needed for accuracy.

 

[Scooby-93]

I use a large for caliber patch wrapped around a Parker Hale jag. I put the JB on the patch before wrapping it around the jag - only because that seems easier.
The reason for the larger patch is so it will be pushed into the grooves.

Wrapping a patch around a well worn bronze or nylon brush works well also. Several experts recommend it.

Either way, the recommendation is to cycle the JB coated patch 5 times in the first 2-3 inches.

When carbon build up gets hard, it takes a bunch of scrubbing to get it out. I've come to go through 3-4 patches, clean the JB out of the barrel and look through the borescope.

I should add that getting the barrel to bare metal may not be needed. Many here will say we should let the target tell us what level of cleaning is needed. It is true that after the first shot, the barrel won't be squeeky clean - so bare metal clean can't be needed for accuracy.

That is my method also with JB, however I had been going at these marks with the above method and JB for hours to no avail.

the gun still shoots but it may shoot better with whatever it is removed, or if it’s a pit I need to monitor it.

Barrel is a bartelin with 700rounds through it.

 

[jelenko]

I had been going at these marks with the above method and JB for hours to no avail.

Hmm. That's a lot!
Are the dark areas actually dark or are they artifacts?
And, to confirm, what areas are you concerned about? Pits at 700 rounds would be, I think, unusual. That said, any chance the inside of the barrel got wet with water? Sweets left for an extended period?

 

[gme]

the only thing I've ever seen that looks like that is leading, are you using FMJ Bullets?

 

[Scooby-93]

Hmm. That's a lot!
Are the dark areas actually dark or are they artifacts?
And, to confirm, what areas are you concerned about? Pits at 700 rounds would be, I think, unusual. That said, any chance the inside of the barrel got wet with water? Sweets left for an extended period?

Dark. When the barrel is completely stripped they almost look like deposits of copper or metal but hard to tell as the light from the teslong is so bright.
no sweets have ever been in the barrel, potentially could have had water in the barrel from wet days but this gun is truck gun, goes from back seats of truck to a prone position shoot then back to back seats

 

[Scooby-93]

the only thing I've ever seen that looks like that is leading, are you using FMJ Bullets?

Leading? Sorry I don’t follow?
It’s only ever had 147eld in it.

I noticed the ‘ marks ‘ at around 400-500 rounds when I first bought the teslong

 

[jelenko]

Dark.

Copper has a copper look. Dark would be carbon, maybe unburnt powder.
Seems odd that would still be in the bore after hours of scrubbing with JB.
They appear to be in the grooves => maybe the patch isn't getting in there.
I would try either a larger size patch [that wraps around the jag more so it's tighter in the bore], or using a patch around a worn brush. The bristles of the brush push the patch/JB into the grooves.

 

[Scooby-93]

Copper has a copper look. Dark would be carbon, maybe unburnt powder.
Seems odd that would still be in the bore after hours of scrubbing with JB.
They appear to be in the grooves => maybe the patch isn't getting in there.
I would try either a larger size patch [that wraps around the jag more so it's tighter in the bore], or using a patch around a worn brush. The bristles of the brush push the patch/JB into the grooves.

I will try a larger patch or a larger brush.
If I recall correctly I did use the biggest brush/patch I could physical get down the barrel without it getting stuck in there

 

[jelenko]

What works well is to use a brush that is for the caliber of the barrel but well worn so it can be moved back and forth.

 

[BoydAllen]

IMO the best thing for hard carbon is IOSSO. The way that I use it is to fill a NYLON brush and short stroke it in the area that needs cleaning. The thing about nylon is that you can reverse a brush that is not worn out in the bore. You can't do that with a new bronze brush, and I would never use an abrasive with a bronze brush because IMO they put too much pressure on the bore to use with an abrasive. I use them all the time with solvent, just not for JB or IOSSO. On the IOSSO, I take particular care to get all of it out of my barrel, and off of my rod and other cleaning equipment. This is not a couple of patches thing. For the initial work I like a light oil, on several patches. Once you have most of it out, you can switch to a solvent. In any case, do not skimp on the removal. The sneaky thing about hard carbon is that unless you have a bore scope you really have no way to know that it is there, since it will give a white patch.

 

[JohnKielly]

I will try a larger patch or a larger brush.

Bartlein warns of instances where JB on tight bronze brushes abrades the bore severely.

 

[pdog2225]

Bartlein warns of instances where JB on tight bronze brushes abrades the bore severely.

I have a couple of savage FV barrels that look similar to these photos. I was told by a very knowledgeable shooter that they are the result of the barrel materiel. He stated that the phosphorus did not get mixed up very well in the mixture. And when first viewed the bore would look good but later as it was shot and cleaned the bore would have these pit like cavities. My barrels shoot up to my standards at this time so I am happy with them. pdog2225

 

[Scooby-93]

I have a couple of savage FV barrels that look similar to these photos. I was told by a very knowledgeable shooter that they are the result of the barrel materiel. He stated that the phosphorus did not get mixed up very well in the mixture. And when first viewed the bore would look good but later as it was shot and cleaned the bore would have these pit like cavities. My barrels shoot up to my standards at this time so I am happy with them. pdog2225

Thank you for your reply but this is a Bartlein barrel, I wouldn’t have thought something like this would occur?
I may be wrong?
just a shame I didn’t invest in a borescope earlier.
Could it potentially be swath from when the barrel was chambered and it hasn’t been removed / cleaned out prior to been shot?

 

[Minshooter]

Dark. When the barrel is completely stripped they almost look like deposits of copper or metal but hard to tell as the light from the teslong is so bright.

Perhaps you need to adjust the light level. The Teslong has a rotary brightness control on the cord.

 

[Scooby-93]

Perhaps you need to adjust the light level. The Teslong has a rotary brightness control on the cord.

Not on the model I have unfortunately