I've not had a factory rifle that didn't need something tweaked or fixed, with the exception of my Ed Brown Damara.
I've never had a Tikka.
For typical factory guns vs custom, if you think they're equivalent, don't buy a borescope...
Some factory barrels look pretty good, but it's not that hard to see the difference thru a Hawkeye. Many, esp. Salvage and Rem, can look pretty rough with tool marks. I'm amazed how well some of those actually shoot.
Then go Hawkeye a Brux, Krieger, etc.
DF