Re: Standared barrel in varmit style stock.
I did that with a Savage .308. I bought a B&C stock for it that feels great and the only downside is as you said; the barrel is obviously smaller than the channel of the stock. I plan on replacing the barrel eventually and saw a deal on the stock and bought it. For grins I installed the barreled action and, naturally, it shoots better in the new stock.
After completing my first bedding job on a Rem 700, I'm tempted to bed this stock for the Savage as is, in spite of the anamolous barrel. Worst case is I'll just have to dremel out the bedding compound forward of the lug whnever I replace the barrel.