Can't say I agree with all his statements, but it's a decent book to gain a general knowlege of muzzleloading arms.
http://www.amazon.com/Complete-Blackpowder-Handbook-Sam-Fadala/dp/0896893901/ref=pd_bbs_2/104-5109669-9753529?ie=UTF8&s=books&qid=1193545395& ;sr=8-2
BTW - do you hunt with an Excalibur? Just guessing from your handle that you probably do.