carbon ring

Just looking for some tips on good products to use to get rid of a carbon ring. It’s cause my bullets to stick bad.

First time poster here looking for some input, Recently picked up a prefit for an American rifle company Nucleus. Chambered in 6.5 creedmoor. I bought it second hand with low round count. Spun it onto my action and torqued it down. Doesn’t close on a no go, closed on go gauge, little tight, but...

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...