I have a variety of open one pound cans of a bunch of different powders. Do they deteriorate significantly after being opened and is there an empirical way for the a way for the average Joe to measure the deterioration. I figure a lot of guys buy 5 lb cans. That loads an awful lot of handgun rounds requiring a lot of time at the press. I can get the larger cans but even with the savings I'm still buying the one pounders simply because they are individually sealed. I guess burn rate is way out of my capabilities.
Thanks folks
Thanks folks