Last week I deprimed and sonic cleaned about 300 pieces of brass in preparation for a run through the AMP. After cleaning, I put the brass in the oven at 230 deg F to dry for an hour. I shut the oven off, but didn't remove the brass (you may guess where this is going). Fast forward to today and I preheated the oven to 400 deg, with the brass still inside. Once preheated, I realized my mistake and immediately removed the brass. So, did I just ruin 300 pieces?