Bore Scope Interpretation

[LiveFire]

I have a ruger 10/22 LVT. Accuracy has always been acceptable to me. I bought it 5 years ago or around there and only somewhat recently bought a teslong bore scope. I have not used the scope much. The gun shoots fine so I am not too worried about what you are about to see but I would like to know what it is. The barrel is 20 inches long. The pictures are from the muzzle back taken a few inches apart. The first 8-9inches of the barrel from chamber forward do not exhibit these "rings." It only starts about halfway down the barrel. What are they caused from?

 

[striperfisher]

Welcome to factory barrel's....That actually looks good compared to some custom rimfire barrels

 

[Emmett Dibble]

I have a factory barrel rifle that has those exact same stains in it... don't know what they are and is shoots "OK" but not particularly well compaired to the factory Annies or rebarreled rifles I have.

 

[PigButtons]

Barrels are made from blanks, which are made from bar stock. Bar stock is either cold rolled, forged, or cold drawn. No matter which method is used there will be imperfections in the material, better quality bar stock will have fewer imperfections and higher cost.

What you are seeing is the result of imperfections in the steel. As others have said, for a factory barrel that is a good one. Now that you have a bore scope, keep the barrel clean and it will keep providing you with good results.

 

[LiveFire]

Thanks for the information. I have been trying to interpret what I see with the bore scope when I am using it. Most the time I search and find an answer but this one had me kind of stumped. I just checked my savage mk2 and noticed it has similar but not as many nor as prominent rings in it. I have a shilen select on an ar15 in 6x45. I have been comparing it to my factory barrels to get an idea of what imperfections and what not look like. But as long as they shoot Im not messing with any of them.

 

[Emmett Dibble]

Inexpensive bore scopes have been the rifle smiths bain…. Never judge a barrel how it looks, judge it by how it shoots. If it doesn’t shoot you may be able to find reason with a bore scope but probably not. Slugging and measuring are much more definitive. I’ve had Lija barrels with chambers not cut well not shoot, I’ve seen factory Savage/Winchester barrels that look like the rifling was cut with a rat tail file on the end of a coat hanger shoot very well.

Cleaning is where they shine. You can tell just how much fouling or copper you are dealing with and how much you need to remove (or leave it) for the barrel to shoot it’s best.

That is where I use mine.

 

[JEFFPPC]

Throw your bore scope and chronograph away. Learn how to tune your rifle and how to read the conditions and flags. You will be way ahead of the pack.Oh, clean properly including the throat. Best value of your borescope is to check for carbon in your throat. Once you learn how to keep it under control , just follow a proper cleaning regimen.