I thought this may be the best place to ask this.

Has anyone tried buying plated bullets such as berry's heating them in an oven, and quenching them to harden them.

I don't have the time to get into casting right now, but for bullets you can buy now days, plated is cheaper than hard cast because hard cast is a trend where people will over pay for the bullets.

If this works, I could take my 10mm RN FP 180gn plated bullets and quench them to essentially make them a hard cast with a thin layer of copper for less deformation and more penetration.