It wont hit the same hardness (dont take my word for it, get a tester) heat treated after a paint bake over quenching from the mold or oven treating. The closer to slump or a longer "soak"at near slump will create higher BHN numbers.
Dropping them coated from a 400 degree paint bake for 20 mins is probably going to make WW metal be around 15 BHN. Obviously it varies with alloy composition.
Powder coated bullets are an "easy" button, and like you said, cover a lot of sins.
But if I had a reason to do so, I havent found it yet.
