Thread: Powder Use By Date?

Originally Posted by kiwi-adam

Hey Guys,

Some time ago I inherited a 4L Plastic Bottle of AR2208 and a 1L Tin Can of IMR4064.
These have been stored in a Cool Dry place however, I am unsure of the age of it.

Does Powder go 'off'? What are the signs?

Thanks in advance!

Greetings Kiwi-Adam,
If the AR2208 is in a plastic container, factory marked AR2208 then it is less than 20 years old. If the metal can of IMR 4064 is marked Dupont it is quite old, at least 30 years Old. If marked IMR Powder Co the it is between 30 and 15 years old.
However if either container has been opened and you don't know the history then there is no way to tell what powder it is and one blown up rifle is way more than it is worth. I am still using Dupont IMR 4064 that I bought well over 30 years ago and has been stored well. Recent tests showed velocities in line with results back then. On the other hand I was given a part tin of AR2208 that, on closer inspection was contaminated with ball powder. Zimmer's advice above covers the deterioration.
Regards and take care Grandpamac.