You didn't get the information you seek because it seemingly doesn't exist. He (generally) uses Zero jacketed bullets because Zero makes low-cost and bulk available jacketed bullets -- in popular sizes and weight that the masses use, and of course that doesn't include .500 S&W Magnum because folks don't plink with X-frames.

Zero doesn't make the magic, cheap bullet that you insist you must have.

If you sold your S&W .500 Magnum and bought a Model 10, you could buy many years worth of jacketed bullets and make your handloads for a pittance.

Every contributor to this discussion bends over to help but you seem no further along than you were in post #1. Can't say we haven't tried our best.