stainless barrel fouling

J

JRB

Guest
I have a 220 Ackley that has a unknown deposit about 3 inches in the bore
The barrel I have had since new, and has 500 rounds down it, the barrel is perfectly clean and is in good order
I recently bought a bore scope to inspect the wear etc.
I have noticed a deposit, that looks like rust pits, as you would find in a neglected CM barrel.
It runs for about 3/8 inch long and dotted about 1/8 wide along the land and then up and over the rifling and into the next land

I have tried all sorts of methods to remove this, from Sweets to JB paste. It will not budge, I can not tell if it is a deposit or pits.
It has me concerned what it is?
Any ideas appreciated
JRB
 
I use polishing paste from Glasurit to polish my barrels when they start to firecrack or get some unwanted spots..

image.jpg
http://www.meile-gmbh-shop.de/Polit...Glasurit-Feinpolierpaste--Tube-mit-375ml.html

for my 6mm barrels I use a nylon brush 6.5mm and cover it well with paste, run it through the barrel 10-20 times, rinse the brush, push a wet patch through the barrel, 2-3 patches sometimes and then repeat the process at least 2 times, then clean the barrel well with shooters choise.

my 6mm br barrel was like new after polishing, shot 4000 rounds, still shoots .250 at 200m
 
JRB said:
I have a 220 Ackley that has a unknown deposit about 3 inches in the bore
The barrel I have had since new, and has 500 rounds down it, the barrel is perfectly clean and is in good order
I recently bought a bore scope to inspect the wear etc.
I have noticed a deposit, that looks like rust pits, as you would find in a neglected CM barrel.
It runs for about 3/8 inch long and dotted about 1/8 wide along the land and then up and over the rifling and into the next land

I have tried all sorts of methods to remove this, from Sweets to JB paste. It will not budge, I can not tell if it is a deposit or pits.
It has me concerned what it is?
Any ideas appreciated
JRB
Click to expand...

My guess is that it's an inclusion, in the steel, neither pits nor a deposit, but a defect in the steel.

If I were a barrel maker I'd have mixed feelings about bore scopes as "a little knowledge is a dangerous thing."
al
 
Boyd Allen said:
Where do you get it, and how does it compare to IOSSO?
Click to expand...

I've never tried iosso so I can't say how it compares.

I bought it at a local paint store, it should be available at all Glasurit dealers.
 
If it shoots well, why look (Don't dare look)? If it doesn't shoot well, why bother?

Probably like alinwa says - an inclusion.
 
Good point,
I guess if I can not shift it, then why worry about it
Just wondering if you guys have seen anything similar?
JRB
 
Well....a good point perhaps in a different context. Kinda comes across "smart assed" now that I read it again.

Yes, I've seen such a number of times all in the same day. Clay Spencer, I think it was, brought his television bore scope to the Super shoot. I was fascinated with the technology and saw the bores of several barrels before I lost interest. Clay knew what he was looking at and described everything we saw. It was like we were standing in the bore with a flashlight just looking around. Just about every barrel we looked at had some off color areas.

I went in there with my rail gun barrel that was legendary. It looked like I had been shooting acid coated meteorites. That was it for that barrel. Next condition I missed it was time for a new one.
 
Wilbur I've used a bore scope for a number of years, and all I concentrate on is the carbon ring at the end of the neck. I use a brush with a patch with brake cleaner then and an oversize brush to get out the harder stuff. Then when I can see its clean I put some flitz on a patch and polish the neck area. Then I start cleaning the barrel till the patches come clean, then I flitz the barrel till those patches start coming clean, then finish with Kroil to get it clean. I've had barrels with cracks and streaks that still shot great, but once that carbon ring gets to bad say goodby to accuracy.

Joe Salt
 
Joe Salt said:
Wilbur I've used a bore scope for a number of years, and all I concentrate on is the carbon ring at the end of the neck. I use a brush with a patch with brake cleaner then and an oversize brush to get out the harder stuff. Then when I can see its clean I put some flitz on a patch and polish the neck area. Then I start cleaning the barrel till the patches come clean, then I flitz the barrel till those patches start coming clean, then finish with Kroil to get it clean. I've had barrels with cracks and streaks that still shot great, but once that carbon ring gets to bad say goodby to accuracy.

Joe Salt
Click to expand...
I did the same thing. Spent my time with the borescope experimenting with cleaning methods, finding in the end that leaning method which stayed on top of the carbon ring. It's comforting to be able to clean normally, peek inside and find no black ring in the gapspace.
 
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