One time about 25 years ago, I cast and sized about 1,500 of this bullet in it's hollowpoint form, over the course of a week. As you know, the Lyman hollowpoint pistol bullet moulds are single cavity. Man, was THAT tedious!
I had luck with just plain wheelweight metal with the solid version in a 2 cavity mould if ran hot, just under frosty bullet heat, and kept going steady to keep the mould hot, like OFT said, but I needed to add tin to get good bullets with the hollowpoint mould. I used 50/50 plumbers solder.
It's a very accurate bullet when cast properly. I think the gascheck makes a big difference.