Somewhere in my surfing I read that cast bullets harden with age. On another thread here I was told that harder bullets will run higher pressures. How soon does this happen? If I cast and load the same day, is it possible for my loads to become unsafe over time? I am currently just casting for my 45 colts and I only have around 300 pieces of brass so they last me around a month. I do not have a hardness tester but I have several boxes of commercial cast bullets. Will these eventually get so hard that they will lead my barrels?
