I recently got a bore scope to follow the rimfire cleaning instructions mentioned elsewhere on the forum.  Out of curiousity I ran the scope on the barrels in other guns and found this.

These are pics from inside an aftermarket barrel I put in a .32-40 Stevens 44 1/2 about 10 years ago.  And the chatter in the groove runs in each groove, the full length of the barrel.

I guess "ulra-rifled", "air guaged" and "XX" were just advertising.

Aside from where to shop in the future, some things I'd just rather not know.

How does it shoot?  Some things are best left unknown. I was offered the use of a shooting friends bore scope awhile back but I refused. I don't want to know flaws 
. I want to know results on target.
Flatlander

Just for fun, I’ll break out my bore scope at the beginning of a big match and let anyone who wants to, look at there bore. 😂 sometimes the reactions are priceless……


Tom Klinger

My first 32-40 Winchester Single Shot rifle was doing well back on 2017. It shot a couple of 250s at the Tacoma matches and took first in the NW ISSA  regional in Spokane. Then I bought a borescope and saw all the  pits and tears in the barrel. It hasn’t shot well since.  I don’t think it liked me for looking too close.

When I bought my Teslong a few years back I was warned to take the results with not a grain, but a box of salt. Good shooting rifles are good shooting rifles, regardless of what they look like. The general consensus is to use it as part of your cleaning process to check the results.
The image is what, 30x? That degree of magnification shows things you would never see otherwise.

Only once was a borescope useful to me. Rifle started throwing flyers all the sudden. Before finding the problem with a borescope I lapped the living crap out of the bore trying to make it shoot. Rechambered it does not throw flyers anymore but doesn't shoot like it did. I now suspect someone ran a tap into the throat.