Thread: Powder: How old is too old?

Just recently disposed of a pound of 3031 recently. Pissed me orf as I was still using it in my 308 sporter.
I had been watching it for a while. Detected a slight colour change from what I had seen in the past and then the strong acrid smell.
Had a nice fire out on the drive. Should have fust thrown it on the lawn as it's supposedly good fertiliser.

Was about 40 ish years old (c 1980) but even then should have been OK as I've always been careful about how I store my powders.

Other experience I had years ago was with recovered milsurp 4895. It was also about 40 years old (c 1944) which should still have been OK. I had it in an old Nobels #2 metal can which had a small screwtop lid. The lid actually blew off and the powder fumed vigorously. Quite scary as in those days all my reloading stuff was stored in a bedroom.