Glen:elmtreeforge.blogspot.com had a recent post with a number of links to resources/pdf's for black powder cartridge reloading.
I am well aware of Firehand and one of his biggest fans! I was going to get into BPCR but gave up on it and approximate antique black powder ballistics with smokeless. In my muzzle loader and percussion pistol I will not burn anything other than The Holy Black! I am down to about 8 lbs. of Goex FFg and FFFg ... but that should carry me through to the end of my days. I don't shoot enough anymore... :)