So, I cleaned about 8,000+ 9mm casings in a jet garden bath with dawn and lemon shine to get a quick and basic cleaning before going back in the bin, to later wet tumble with stainless steel. After finishing, I cooked the brass at 170* for an hour to dry it off. No problem...
Then, while I was away, my wife forgot it was in there cooling off and preheated the oven to 400*. She immediately noticed as it was finished preheating (took about 15 minutes to get to that temp, and immediately removed them and air cooled). About 1/4 of the cases have that annealed look to them, though they weren't above 300 degrees long at all.
Should I worry about the case head, or based on the low pressure of the 9mm and the short exposure time in a moderately high temperature, give them a shot? Thoughts? Hoping to not throw away my entire 9mm collection, was about to load up 1k!
Uploading a picture of some of the brass from the bottom of the pans, vs the top (more annealed look).
Then, while I was away, my wife forgot it was in there cooling off and preheated the oven to 400*. She immediately noticed as it was finished preheating (took about 15 minutes to get to that temp, and immediately removed them and air cooled). About 1/4 of the cases have that annealed look to them, though they weren't above 300 degrees long at all.
Should I worry about the case head, or based on the low pressure of the 9mm and the short exposure time in a moderately high temperature, give them a shot? Thoughts? Hoping to not throw away my entire 9mm collection, was about to load up 1k!
Uploading a picture of some of the brass from the bottom of the pans, vs the top (more annealed look).