Home Forums Hunting & Shooting Ask The Gunwriters Definitely a believer in a borescope now

So I just recently came upon a 1960 vintage Marlin 336 in .35 Remington, as I posted in the Marlin 336 forum the other day. Gun is pristine, 3 minor scratches in the wood and blueing is like 98%. Doesn't look like it was hardly used, and how much can a eastern woods rifle be shot, I mean sight in in, take a few shots each year you hunt to make sure it held zero, and hopefully get a shot or 2 at a deer. The rifle looks more like it sat for years in a closet.

So I figured to give it a thorough cleaning today, and coincidentally, my son gave me an early Christmas present of a Teslong borescope.

First 3 patches on the top left are a dry patch to push the loose crud out, and then 2 soaked in Hoppes #9. Let it sit for 20 minutes, then ten strokes with the bore brush soaked in the same, and sit for another 20 minutes. then the lower left 3 patches and it looks decent. A few dry patches, then the first patch on the right, soaked in Shooters Choice and let it sit in the barrel for 20 minutes, followed by 20 strokes in & out with the bore brush followed by 3 wet patches with the Shooters Choice, and I can't find a bit of dirt or "blue" on the last patch so I say to myself, this bore is immaculate, there isn't any copper in there.


So I figured I'd prove to myself how well I can clean a gun and got the borescope out and got it working and holy chit, I'd have never believed there could be any copper in that bore and I was WRONG again, LMAO.



Plenty of copper in there, despite the fact I'm sure the gun has a low round count.
So my question is, is it that Shooters Choice not a strong enough copper remover and I need something stronger like Montana Extreme, or is it going to require JB bore paste to get this copper out?

That looks like rust.

Great image with the Teslong!

Teslong Borescope

Does it shoot poorly? Why is it essential to have every nano-ounce of copper out of the bore?

Is it? Not sure as I never used a bore scope before. Opinions welcome.

That's what I thought

Rust or grease.

Copper is almost always oxidized, unless it’s really fresh.

Yes rust but not that bad

Have not shot it yet PA, I just got the gun the other day.


Yes, not to bad. I used a nylon brush as Shooters Choice tends to eat up phosphor bronze brushes quickly.
I should be able to get it out with a phosphor bronze brush soaked in Kroil.

And the borescope will let me know, I was surprised how nice of a picture it gets you, a lot of borescope for the price.

Looks like rust to me.

I have the Teslong and agree. Did you use the app and your phone, or your computer?

Thanks,

Jason

Another rust vote here.

The picture looks nice.

I just plugged the usb connector into my laptop with Windows 10 per their instructions and clicked on "camera" and there it was, pretty easy.

Is this the one you have?

Teslong Borescope

Sometimes, being obvious really is bliss.

For really picky (anal) people like me., maybe it is better to simply believe there are no problems instead of looking with a magnifier for any possible imperfections. lol

That’s the one.

Shoot it a while, then clean it. If it's still there, a little lapping might help. I wouldn't worry too much if it shoots well. Just keep it cleaned and oil it for storage.

Yep, rust ... cooper typically looks like long streaks along the bore and more gold colored.

I would use some JB bore paste on it to see if it cleans up a bit, then hit it with hoppes and then oil... and shoot it - then look at it again to see how it reacted.

My guess is the top of the lands will clean pretty quickly, but the grooves have machinging marks and probably won’t clean up all that well at first.

tag

I would really go after it with JB or even 0000 steel wool + JB. I would also consider Tubbs Final finish or other fire lap. That would knock the rust out and smooth up those tool marks. I real hand lapping wouldn't hurt either but risky doing it from the muzzle end with out a bore guide so that is out.

But if it shoots why worry? On an iron sighted lever gun if I can bang away standing with no rest and keep everything in the black I consider it good.

Soak it in Kroil oil for 2-4 hrs then brush and patch. JB would be a last resort.