I was going through some stuff in the attic and I opened up a box and found some metal cans of powder (4064, 4350, 4831, and FFF black powder) that I bought in the late 1980s. Also in the box was a whole brick of CCI 250 magnum primers. Now I live in Laredo TX, my attic gets hotter than the surface of the sun. 10 minutes up there you'll pass out from heatstroke in the summer. Anyway I examined the powder and nothing looked or smelled any different than the fresh powder on my bench inside the house. i was surprised at how fresh it appeared but I threw it all out anyway (too risky), but I took a few of the primers and loaded some dummy rounds. They all went bang, should have worn ear pro, they were loud! My wife came outside to see what I was doing. I ran em head to head with new primers over the Chrono, there was no repeatable difference or trend I could detect, so I'm using them.
