Slamfire--So if powder is stored in the original container and kept below 72 degrees F is autoignition a risk? I have some Blue Dot and 4350 that is coming on 10 years old. Also a couple of cans of old H4895 that may be pushing 30 years old, and were probably kept in a garage for 10 years (I inherited the stuff). It looks just like new (just checked) and smells weakly of solvent. I have shot some of the rounds that were loaded back when with the 4895 and they work just fine.
I suppose a loader should routinely check all of the powder on the shelf and make sure nothing is amiss. Hate like heck to burn the house down with a $20 can of powder for being a tight a** and keeping it rather than throw it on the lawn.