Barrel makers hate shooters with bore scopes.... especially cheap bore scopes....

1. you likely don't know what you're looking at (I wouldn't really know myself)

2. it does not show enough detail to actually see an issue because it's a cheap bore scope....

3. how it looks does not really correlate with how it will shoot.

So, just shoot the barrel and make a determination from there. If you do not yet have solid fundamentals to shoot good groups etc., then work on that before you make a final determination! Everything else sounds like the norm.

As far as break in I might shoot 10rds and give it a quick light cleaning, then shoot it till I get 150-200rds on it before I do any serious load dev if you're a reloader. If you aren't just buy quality factory stuff like Prime, Copper Creek, or Hornady and shoot whatever shoots best.

Lastly have fun!