I heat treated some PC'd gas check installed 260gr 44 mag bullets at 425F for one hour, water quenched and the copper checks turned a solid brass color. My convection toaster type oven does not have any identifiable hot spots (in the past I had positioned thermocouples at many locations looking for them).
So I must assume I have fully annealed the installed gas checks. Can I expect any issues or is this just a 'whatever' thing?