Given a light barrel that’s not floated it’s highly likely this is not a quarter MOA rifle and chasing that goal my be the problem here. I assume this is a hunting rifle and if so, less than MOA is more than sufficient.
I would back off and take the .8 MOA.
You are right. I did some quick research on the Weatherby Vanguard to confirm what I thought as well which agrees with what Doom2 is saying here. The Weatherby Vanguard with factory stock is definitely not free-floated and not intended to be free-floated by design, and Weatherby confirms this. My impression is to agree this seems common for very light barreled hunting rifles, which is what this is. Bedding a rifle like this is something I have no experience with and know nothing about. Is that entailing just trying to get a more consistent purchase with the action and stock around the recoil lug primarily, or along the barrel as well?