I didn't reload for several years and I have many cans of older powder sitting around that are anywhere from 8 to 12 years old. The powder has been kept dry but has been exposed to extreme temperatures (I lived in Las Vegas for 9 years). First is the powder safe or will there be any change in performance? And second, if it is not, what is the best way to dispose of it?
Ignorance is bliss...unless you're aware of it.