I was going through my stash of powder and realized I have Hodgdon and IMR for the popular powders in which each manufacture offers the same 4-digit # ( H4895, IMR 4895). I fully realize that in almost every instance they are different powders which require different data, but in 20 years of handloading I’ve developed a strong preference for one over the other. So how do you lean?

Me:
4198 -H
4895 -IMR
4350 -H
4831- IMR

Stuck in airports, Terrorized
Sent to meetings, Hypnotized
Over-exposed, Commercialized
Handle me with Care...
-Traveling Wilbury's