My brother-in-law just discovered three blackpowder revolvers in his closet that he inherited years ago and forgot about. They're all Italian made replicas. There's 2 1851 navys, one .36 and one .44, and a "Whitneyville Walker" .44 that's a behemoth. What do I need to get started? How do I clean and take care of them? Can I use Pyrodex pellets like in my in-line rifle? Is it safe to load all six chambers? Any information, no matter how general, will be greatly appreciated.