New P.P mold for 45-70

[Randy Bohannon]

I want to get a paper patch mold for my Shiloh 45-70. I have been shooting the 540 gr. Paul Jones Creedmoor 45001 for the past 12 yrs thought it was all I would ever want, it shoots very well out to 500M. I bought a Steve Brooks Pointed bullet mold off of gunbroker for $100.00 it cast a 510 gr bullet @.460
the mold fins bad with either Cabin Tree handles or Redding. I have taken to running the bullets through a Lee .460 push through sizing die to clean them up.It does very well and these shoot even better than the PJ mold.
I was thinking of a p.p mold with the pointed profile and a bit heavier @530-540 gr. I have a lifetime and then some supply of Plover/Neenah cockle finished onion/25% cotton paper it measures .10 with my digital calipers.I plan on dry wrapping so thinning when wet is not a issue.
I could use some help with the diameter of the bullet math. .450 bore - two wraps of .10 = .20 .450-.20 = .430 for bore dia. paper patched to get to .450. Am I all wet ?
Thank you in advance to Gunlaker and Don who undoubtedly will have great wisdom.
Randy