Big scratch in barrel?

[SouthFLShootin]

I have a proof carbon barrel in 6GT and it started shooting worse than it usually does. I figured it was dirty, which it was, so I started with my normal barrel cleaning routine which consists of Patch-Out, Accelerator and nylon brushes. I use a quality cleaning rod and bore guide as well.

After cleaning, I go in with a bore scope just to see what things look like and I noticed a pretty big scratch from the freebore all the way about 2/3 down the barrel I have never seen before. It stays on the same groove of rifling the whole way.

Obviously only way to tell if affects shooting is to shoot it after cleaning, but curious as to what may have caused it.

Only thing I can think of is maybe a stainless bead from wet tumbling?

I'm really hoping this isn't what is causing this barrel to shoot poorly....

 

[MDof2]

What's the target say?

 

[SouthFLShootin]

What's the target say?

Haven't shot it since cleaning it and noticing it.


But it went fromt shooting under half MOA to about MOA, which was what originally made me clean the barrel and find it.

 

[Mr. F]

Nothing you can do, a scratch on the borescope will look ten time worse than it actually is.

Ive seen way worse thru some of my heavy use barrels.

As far as a ss bead being the culprit maybe, but looks too straight to me. You checked after cleaning so it could’ve been at the cleaning session that happened.

I wouldn’t lose sleep until fouling it again and sending some rounds down with a known load that’s accurate.

 

[AccuSol-ERN]

Obviously, shoot it and see what happens.

Did you borescope when the barrel was new? Over the years I have seen a few barrels that SS media had been shot through them. I can't say I have seen one that followed a land......usually they tumble and gouge or get sideways and really dig in.

Ern

 

[acudaowner]

0000 steel wool would clean that right up if it's a stainless barrel