Heh. I know when I buy bullets the first thing I think of is:
"Should I put rock salt in these and seal them with wax, now that I've already paid for a precision-engineered product?"
It strikes me as a little Turn of the Century...as in the 18th century. Too much time on your hands. If you're interested in handloading, you do it to save money, and so you want to buy pre-made bullets in bulk at good prices and load them yourself and save the brass.
Um, no. I buy them, I load them into my gun(s), and I shoot them according to the purpose of use the bullet was designed for. We have such a nice, wide selection of well-engineered bullets already on the market. I'll make a bet that there are only a very small group of handloaders who even experiment with fundamentally "different" bullet designs.
Maybe if you're in the R&D Department at Hornady...but even then I don't see anyone doing the "wax and rock salt" thing. You're not going to get much rock salt into a 9mm hollowpoint round in any case, and after being hit by one, the bad guy isn't going to be worried about the rock salt.