carbon ring

Yes I know, tons of carbon ring threads already, but this one is mine Lol. So in the 35+ years of shooting centerfire rifles I've never ever had one before and I dont have a bore scope, at least not yet, so here is the issue. I started getting a sticky bolt on my 7mm Rem Mag on loads that have...

I recently purchased a Teslong Borescope and regretfully there is not a library of images on google to compare my barrels to. Please provide any and all feedback on what I am seeing in the below images. I am intentionally leaving out round counts on the barrels to not bias anyone's answers...