But Mr. Ganderite, you are a true handloader. Many on here are not!
That may be. I said what
I would do. I did not suggest that others do the same.
It all depends on how big the quantity. I found a 45 pound drum of powder that was labeled 4895. I could see that it was not. I had a vague memory (at my age I have a lot of those...) of a drum of powder being damaged and decanting the powder into an empty drum. I assumed my label had fallen off.
The powder looked like 4350 or 4831. Since I only had Bofors and Expro powders in large drums, my best guess it was an Expro powder and 4831 or 4350.
I made up a load on the assumption it was 4350 and fired across a Chrony. If velocity was low, I would try a 4831 load. But velocity was about right, so I decanted the powder into milk jugs and labelled it.
I think most guys here would think long and hard before tossing 45 pounds of powder.
I recall getting a PM from a guy who had found 100 pounds of unidentified powder in an estate. he asked me how he could test it. I suggested he send it to me, and I would test.
He did. I immediately noticed it was very dense. Then I noted it was gritty. Then I concluded it was sandblasting grit.
I still have it. One day I will find a use for it.