Hey Bruce, I appreciate your input as well as others.

I grew really weary of the other borescope. It's not really a buy one cry once because the Teslong (proven) is cheap. So I got a Teslong.

True to its name, Proshot Copper Solvent 4 removes.... Copper. Only copper. Literally nothing else. Ther internet wisdom said "it's great, removes all the impurities" Well... not so much. I wanted to believe. I really wanted to believe but well.... the pictures speak for themselves.

The crown is.... not really a crown. It is, however, a really decent arrangement of pits.
Attachment 117376

All the big globs of 'stuff' appear to be carbon or lead. Looks like carbon to me, but it seems like carbon would not glop up so much. I DO see shiny metal peeking in spots though. The copper remover appears to have removed copper. I am not holding my breath that the bore is shiny underneath the fouling, but only further cleaning will tell. The lands do look rather sharp though! Not bad for an old thing used hard enough to need an FR one year after its construction.
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Ah, cordite. (throat). I've seen worse, not concerned.
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Bottom of throat. You can see traces of rifling still exist there. It's not much, but it is there.
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Chamber shoulder.
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Chamber neck.
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I recall the bolt was always a little sticky on primary extraction despite locking lugs passing the sharpie test. After seeing the chamber in better fidelity, I now know exactly why. This rifle is a collection piece and a range toy so slightly sticky extraction due to chamber roughness I can live with. I'll still give it a real good cleaning with nylon but I'm not about to try and lap/polish/hone/etc.

I think it would shoot quite well with a slightly aggressive recrown (thinking 30*) and fixed wood/stocking. I have some neway small series cutters but sadly the carbide inserts have end angles which prevent them from working for this application (cannot get them close enough together while maintaining pilot clearance).

I'll have to call PT&G to see if their tools use a live center or a dead center. Really hoping their 30-60* cutter uses a live expanding pilot with at least 2 contact surfaces.

Woodwork is on a brief hold while I am finishing my K11 project. K11 is going smoothy and it only required de-molding the stock and applying original swiss fomula with some rust conversion.