Bore scope questions

[esromvre1]

Is there a place to get the information of what I am seeing and what I want to see in a bore scope?

Carbon
Copper
Damage
Tooling marks
Properly crowned
Properly chambered
And any other uses for a bore scope

Looking for pictures and explains of what is right and wrong. And exactly what I am looking at in each picture.

All help is greatly appreciated

 

[SSL]

Is there a place to get the information of what I am seeing and what I want to see in a bore scope?

Carbon
Copper
Damage
Tooling marks
Properly crowned
Properly chambered
And any other uses for a bore scope

Looking for pictures and explains of what is right and wrong. And exactly what I am looking at in each picture.

All help is greatly appreciated

Do a search on this forum for 'Teslong". Lots of posts and a lot of questions and answers about what we see. As to all that info in one place...great idea but I don't know of such a resource.

 

[6MMsteve]

scope a brand new barrel factory and custom note the differences. then you will have carbon and copper buildup, as you shoot then firecracking, on new barrels factory or custom note the chamber finish smoothness roughness same for the barrel finish, and there are lots of pics on here for diif things worm tracks fire cracking carbon buildup etc

 

[Straightshooter1]

Is there a place to get the information of what I am seeing and what I want to see in a bore scope?

Carbon
Copper
Damage
Tooling marks
Properly crowned
Properly chambered
And any other uses for a bore scope

Looking for pictures and explains of what is right and wrong. And exactly what I am looking at in each picture.

All help is greatly appreciated

Keep in mind that a bore scope's magnification will show you things that really don't have much or any effect on the barrel's performance. But a well done lapped barrel is almost perfect and very distinct from what one will see in factory barrel.

Other uses for bore scope: check out for case head separation sign inside cases; see if if you're got excess ear wax.

Properly chambered: I've found sizeable variations like very uneven lands where one is long and other is short.

Tooling marks: typically stand out as scratches or grove on the rifling's that are perpendicular to the bore and bad tool marks can be gouges in any part of the bore or chamber.

Carbon: it's black (like this where some carbon remains of the carbon ring after some attempt to remove it



Copper: it's easily identifiable . . . it's copper in color


Damage (or low quality production): difference from a high quality bore from a factory here


Crown area: good vs poor

 

[DShortt]

I would also suggest that if the barrel shoots to your expectations then don't get overly concerned about what you see inside the bore. On such a barrel I like a borescope to evaluate my cleaning procedure and that's all.
If a barrel won't shoot well and you've been through the usual suspects (loose hardware, scope problems, etc) THEN I pay more attention to what I see inside the bore.
Over time you'll learn about what you see. Unfortunately it's a learning process and it will take time and experience.

 

[6MMsteve]

ar barrel where the gas port lays, this is after the bullet passes the port where it's swaged then hit's gas port bullet swells then hits the port edge

 

[esromvre1]

All now this is some great information and the pictures as a visual guide makes so much more sense to me.
Thank you all and please keep more information coming as I have verified and learned more in this little bit of shared information than I have just listening to people talk.

 

[6MMsteve]

you can also use the scope to check reloading dies, sear on trigger smoothness. things you want a closeup of, anything you can't see well under, use your imagination.

 

[6MMsteve]

Case neck length to end of chamber and the start of firecrackering

 

[esromvre1]

View attachment 1401707Case neck length to end of chamber and the start of firecrackering

My borescope is not that long. That is something that I wish that I was able to do.

 

[DShortt]

My borescope is not that long. That is something that I wish that I was able to do.

I think you should be able to go in from the chamber end and see the same thing. Just remove the bolt and go in through the receiver. If you want to see what it looks like with the brass in there, just sacrifice a piece and drill the primer pocket oversized then seat it in the chamber with your fingers and have a look.

 

[6MMsteve]

I think you should be able to go in from the chamber end and see the same thing. Just remove the bolt and go in through the receiver. If you want to see what it looks like with the brass in there, just sacrifice a piece and drill the primer pocket oversized then seat it in the chamber with your fingers and have a look.

yep^^^^^drill a pc of brass... more than one way to skin Morris

 

[esromvre1]

yep^^^^^drill a pc of brass... more than one way to skin Morris

No no no have you all seen the price of brass??? Almost as bad as warming up my duramax. Lol

 

[6MMsteve]

No no no have you all seen the price of brass??? Almost as bad as warming up my duramax. Lol

I could mail you a couple pcs whatcha shooting I may have some

 

[esromvre1]

I could mail you a couple pcs whatcha shooting I may have some

No worries I do appreciate it though.
It would break my heart to drill good brass.
I'm sure I can find some fc or rp laying around

 

[jepp2]

All help is greatly appreciated

Some of the things you had listed are very subjective. Couple of tips.
- don't look if it will make you miss sleep
- understand how much bigger than real life everything appears
- take time to learn lands from grooves

I'll include an article that I feel does a pretty good job covering the cleaning aspect.

 

[esromvre1]

Keep in mind that a bore scope's magnification will show you things that really don't have much or any effect on the barrel's performance. But a well done lapped barrel is almost perfect and very distinct from what one will see in factory barrel.

Other uses for bore scope: check out for case head separation sign inside cases; see if if you're got excess ear wax.

Properly chambered: I've found sizeable variations like very uneven lands where one is long and other is short.

Tooling marks: typically stand out as scratches or grove on the rifling's that are perpendicular to the bore and bad tool marks can be gouges in any part of the bore or chamber.

Carbon: it's black (like this where some carbon remains of the carbon ring after some attempt to remove it

View attachment 1400902

Copper: it's easily identifiable . . . it's copper in color
View attachment 1400904

Damage (or low quality production): difference from a high quality bore from a factory here
View attachment 1400907View attachment 1400912

Crown area: good vs poor

View attachment 1400915View attachment 1400917

Purchased a better borescope this info was great

 

[jelenko]

Keep in mind that a bore scope's magnification will show you things that really don't have much or any effect on the barrel's performance. But a well done lapped barrel is almost perfect and very distinct from what one will see in factory barrel.

Other uses for bore scope: check out for case head separation sign inside cases; see if if you're got excess ear wax.

Properly chambered: I've found sizeable variations like very uneven lands where one is long and other is short.

Tooling marks: typically stand out as scratches or grove on the rifling's that are perpendicular to the bore and bad tool marks can be gouges in any part of the bore or chamber.

Carbon: it's black (like this where some carbon remains of the carbon ring after some attempt to remove it

View attachment 1400902

Copper: it's easily identifiable . . . it's copper in color
View attachment 1400904

Damage (or low quality production): difference from a high quality bore from a factory here
View attachment 1400907View attachment 1400912

Crown area: good vs poor

View attachment 1400915View attachment 1400917

What borescope are you using? Those are some nice pics!

 

[Straightshooter1]

What borescope are you using? Those are some nice pics!

It is one of the cheap Teslongs.

 

[MikeT49]

I had a new .243 factory barrel that was driving me bug frog. It would sorta shoot, then spit one, etc. Luckily, that was back when components were readily available. Wasted about 200 rounds. Picked up a Lyman borecam. Turns out that barrel had a crooked leade. The "ramps" leading up to the start of the lands were shorter on one side than the other. It got added to my garden stake collection.