Laminated Bore and questions

[11Bravo]

Good Evening All,
So today I played with my new toy, a bore endoscope, and boy was I surprised. I have 4 SxSs that I want to inspect, what I saw surprised me. The photos are of a hammer breach loader that has a Belgian laminated barrel not proofed for nitro. Why I showed this one is I have fired it with BP shells and the old guy I got it from 30 years ago used to shoot modern shells in the 60s. Looking down the barrels the bores looked good but with the bore scope not so nice.

Firstly has anyone else looked at their Damascus, twist or laminate and saw the joining lines of the ribbon that gets wrapped around?
I would think after the barrel was hammer forged that the barrel would be bored and the lines would vanish.
I was also surprised by the machine marks that are visible, I know the outside was draw filed but how did they finish the bore?

Like said this bore looked great until I saw the inside.

 

[ohio ramrod]

looks like a danger waiting to happen.

 

[megasupermagnum]

I'm no expert, but that doesn't look like anything to worry about to me. That looks like a scratch, could be from when it was made. It could be a from a cleaning rod, or who knows. If it was going to let go, it would have let go with modern ammo in the 60's.

 

[11Bravo]

I'm far from being worried about this barrel, I was just curios about if anyone else has done some bore inspection on their hammer forged barrel. Both SxSs percussion I looked at also have those joining lines. Ohio Ramrod, some folks thrive on danger, Guess I'm one of them

 

[megasupermagnum]

I don't think that is a joining line, it is way too straight.

 

[sheriff john]

The few damascus barrels I've seen that had failed were apparently all from using modern ammo in old guns. I'm talking few than a 1/2-dozen in my lifetime. One was at a goose-hunting outfit in north Missouri. Man came back from his blind with a split in the barrel just ahead of the forearm. Heavy smokeless goose loads I would guess. Others were just ones I saw here and there, don't know what happened really.

 

[11Bravo]

The first photo shows what I'm talking about. If you look at the top line running on a 45* angle, then look below you see the same but only part of it. What I haven't looked at yet was my modern skeet O/U just to see the finish. It could be that the camera picks up even the slightest imperfection? The bottom photo shows many scratches that run the barrels length. I got this before anyone was shooting steel and I never did, so maybe just shooting with a dirty bore caused it? As I always said, wish they could talk.

 

[megasupermagnum]

Oh, you are talking about the finish? No, that is not unusual at all. If anything, that bore looks smoother than a lot of modern shotgun barrels. Heck, it looks better than a lot of rifle barrels.