Good looking slug, Ed. I wonder how many 5 gallon pails of water it will penetrate. That's pretty light for an 8, isn't it? should be able to get it really trucking. I would think you might want to try WW hardened. 460F or thereabouts for 1 hour then quenched in a bucket of tap water - something soft on the bottom, let sit for 12 hours or more & they should come up to brinel 30 approx. I Suspect you've done this before.