Good deal shilo!
If you don't get the accuracy you want with just the conicals alone, get some wads. Fiber Gasket, Felt, Card or whatever you can find. I use gasket wads that I bought from Cabelas, .518" diameter by .060" thick. You will get better consistency, shot to shot. Do the Precision Rifle Ultimate Keith Solids come pre-lubed? I haven't shot those, cause I like the ones I shoot now, and they work too.
The bullets at or .001" over your bore should shoot well. Slight engraving will ensure your bullet will stay put on your charge on a clean bore without having to shoot a fowling charge (squibb load). The slip-fit bullets will obturate (belly out) into the rifling when the charge goes off giving you the ability to load and shoot without swabbing. If you are going to hunt on a clean bore, you will want to swab to have the clean bore condition between each shot once you fine tune your load.
Specify pure lead from Bull Shop. Good luck with your loads and out West.