If it is a .460 groove diameter and a .450 lead bullet, I would try a certain art paper that will bring that .450 up to .460 in the traditional two wraps. At the moment, the name is slipping my from my memory but I have some in the basement I can find when you are ready. The load development is really quite simple and straight forward, but it seems you have until Saturday as I recall and it does look like you are adequately good to go for now. But give me a holler if you want some suggestions down the line.
When you kill something with that rifle, you really need to take pictures right there in the field "as it fell". Good pictures! That rifle deserves good pictures (and we here would love to enjoy them all after Thanksgiving.
Brent
Brent