Mech,

I use water quenched cast bullet, Lyman #375449, that I anneal the nose portion. Works like a Nosler Partition. Nose approx. 8 Brinnell, shank approx. 21 Brinell, with gas check. Nose expands approx. 2 calibers, sometimes rubs off upon contact, shank carries on through. I use them in 375 WCF and 375 JDJ handguns. Work as well as, perhaps better than jacketed.

Doc