Tooling Marks in Borescope?

[Bidwell]

Was looking at my Ruger American 308 chamber in a borescope and saw these scratches. Assuming these are tooling marks from manufacturering? One looks fairly deep. Would this cause any accuracy issues? The rifle shoots well enough, not super concerned about it. Just curious to hear some thoughts on it.

 

[Caseknife]

Don't look down a Savage barrel! If it shoots good wouldn't worry about it, may copper up a bit easier. Bore scopes are good, but they can cause a bunch of consternation.

 

[Bidwell]

Don't look down a Savage barrel! If it shoots good wouldn't worry about it, may copper up a bit easier. Bore scopes are good, but they can cause a bunch of consternation.

Ha! Gotcha, yeah no really concerned about, more curious than anything. The barrel looks pretty nice, at least from my untrained eye. Thanks for the advice.

 

[chaser_2332]

Borescopes have caused more people to think good rifles are bad more than they have helped. Shoot your gun, if it hammers ignore the bore scope

 

[Tullis94]

If the gun shoots I don't care what the bore looks like.

I do have a borescope, and like to look inside my barrels, but I've seen some pretty ugly ones shoot great. The borescope did help me get a repacment barrel once. I had a prefit that would not shoot with some very heavy tooling marks. I sent them a video and they ended up replacing it after they called me with some questions.

 

[RyanT26]

You should only care what the target looks like, not the bore.
Then throw the bore scope away or sell it. They are a near useless tool.

 

[def90]

Was looking at my Ruger American 308 chamber in a borescope and saw these scratches. Assuming these are tooling marks from manufacturering? One looks fairly deep. Would this cause any accuracy issues? The rifle shoots well enough, not super concerned about it. Just curious to hear some thoughts on it.
View attachment 813095

No, that is not going to cause accuracy issues.

 

[Wrench]

If I had to guess, I would guess a case had something on it as the scratches are way closer to the ramp profile than retracting a reamer.

 

[gbflyer]

You should only care what the target looks like, not the bore.
Then throw the bore scope away or sell it. They are a near useless tool.

I think there are a few folks around who know what they are looking for. I do not fit in that category and agree with your assessment.

 

[Shortschaf]

If I had to guess, I would guess a case had something on it as the scratches are way closer to the ramp profile than retracting a reamer.

+1 to this

 

[Article 4]

+1 to this

+2 and add they dont look like they are in the lands at all, so no biggie. Shoot it, if it shoots well, who care

 

[TaperPin]

Quite normal. One of the best things a new borescope owner can do is look at as many barrels as you can - they all look rough, and some are very rough.

If you ever have a rifle that starts shooting poorly, if you clean or not, a borescope will pay for itself because it provides real information that helps diagnose problems that are otherwise invisible.

This image shows a well developed carbon ring that has expanded well up the free bore and throat, this was taken after cleaning. Just quickly cleaning with C4 doesn’t guarantee it will remove a big old buildup of super dense, super hard carbon. Some of these don’t come out even when the person doing the work is used to removing carbon rings, and abrasive cleaners, very aggressive cleaners like CLR, or spinning bronze brushes in a drill have to be used.

I love to see these in a take off barrel, because that’s probably what caused the person to give up, replace it, and sell it to me. *evil grin*