I just bought a toaster oven to try heat treating some boolits as I'm getting leading in my 32 H&R Mag. I've tried different lubes, sizes and cast hardness now I'm onto heat treating to see if I can track it down.
My question is about heat treating and I can't seem to run down the answer here on several threads. Is there any difference in heat treating boolits that are several months old vs newly cast if both start out at the same BHN? IE: does age have any bearing on the final hardness?