I would go to Cabelas or Midway and buy several reloading manuals - Nosler, Speer, Hornady, Hodgdon ... I use the Hodgdon manual the most, followed by Nosler, but that is because of bullet and powder choices. The Freedom Arms website is excellent data insofar as it goes. The bullet and powder companies have some data online at their various sites.
Lyman may have some good data for heavier bullets in the 454, but it has been a long time since I looked at it and I left mine at the office. Hodgdon's regular manual, and the Hodgdon Annual Manual, get used the most here. But I use Hodgdon powders almost exclusively.
I mostly shoot cast 300's, but cast 320's, 335's, 360's, and even 395's work just fine. 300 is the magic number it seems for my range/guns/loads.
I would expect you will wind up needing to get a spare shorter sight blade for use with the ACP cylinder. This is what I would do, anyway, rather than having to jack with the rear sight settings all the time.
If it was me, I would use 454 brass in the 454 cylinder. The 454 does pretty good with plinker loads.