Never had a brass mold, or a HP mold that I could cast worth a darned with. Bought a new to me, and almost new 358429 brass hp. Spent most of the day conditioning it. Had to fight serious temptation to jump right to casting with it. And WOW. I like to think I'm a hard one to impress, but this has to be the best mold I've ever had. Absolutely flawless machining, and casts like a dream. Going to have to start a MP collection now. Something else to spend money on