I watched a video recently where the builder stated he was concerned about the first 6-8” at the breech, and about the same at the muzzle. In between he wasn’t concerned about perfection. It wasn’t sloppy, but not perfect.
Also, is your stock a pre-carved, or pre-inletted? Pre-carve doesn’t have any lock or trigger mortise.
Because your stock is a Pre-carve you may wish to look at the space between the bottom of the barrel channel and the top of the RR hole. Usually, on pre-XXXX they leave a generous amount of wood (web) space there.
Ideally a space of 1/8" is good as it keeps the profile of the rifle "very slim" when it's all said and done. If your at the very start you may wish to consider scraping the barrel channel to get to that 1/8" distance. Just a thought.