Bootlaceb,
I looked at FALphils list and it is very comprehensive. That said, I doubt that any of the rifles in the top 20 at the F-class National shot a Shaw bbl. $10 for paint will cover an aerosol can job. He is obviously a very handy fellow and worked on a very tight budget. If you are at his level of ability, give it a shot.
A few years back I started to fit my own bbls and have done my own paint. A winning custom bbl will run a little over $300 and that is just the blank in your hand, not chambered and fitted. Buy the way,you want that 6 BR bbl to be stainless and to be 30-32 inches long. Check out the local auto paint store and see what the cheapest base coat, clear coat, paint runs. Don't forget the catalyst and reducer.
I am not trying to diminish FALphils accomplishments at all. He did a lot with very little. What I see is a rifle that doesn't have a lot of room for growth as his skills grow. He is going to spend a whole lot of cash to upgrade his rifle. It becomes a money pit that rarely reaches the shooters potential.
I am not up on the level of accuracy out of the box for a Savage, but would do some investigating. See if you can find an equipment list and gunsmith list from the recent F-class nationals at Lodi. That would be a good starting point to see what was competitive.
One of the issues that FALphil brought up is the quality of a factory bbl. Some will respond to that firelapping and others will not. A custom rifle will have a custom bbl. They are typically going to out perform a factory bbl most of the time.,there are those exceptions but I wouldn't plan on getting one).
You would also be getting some other parts like a dedicated stock,probably a max forend width)maybe fiberglass or at least laminated, good trigger, 20 MOA scope rail, and perhaps a shot at a decent scope and reloading equipment.
Once you start totaling up the expense of each of the gunsmiths tasks to build a rifle, it adds up real quick. I would rather pay 1500-1800 for a used custom rifle than build a rifle with a factory action. Been there, done that.
Did the factory action rifle shoot, yes it did. Was the rifle cheaper cause I pieced it a little at a time. No it wasn't and I still had a Remington 40X action rifle that cost much more than its resale value.
The above is just my honest opinion and therefore worth exactly what you paid for it

Everyone will work within their budget, sometimes you have to be a bit creative,sell something) to reach a little higher.
Bob