Zombie thread? Not even close. this thread was started only 3 years ago. I've had one of my threads come back to life after 10 years here! LOL
The relevance is that the OP has a bunch of these powders and wanted to know if he could use them in the 45 Colt. Larry Gibson and Crow Eater gave the most useful responses.
I recently picked up a Uberti SAA 45 Colt and was digging through my powder stash and found a almost full can of Dupont PB that came from my late father and found the info. in this thread helpful.