Sounds fun! Hope all goes well.
I don’t like cast at velocity’s over 1300 on big stuff unless it’s heat treated. Had a friend that took 454 moose hunting with 335 WFN’s at 1600 and brought back pieces of bullet. Alloy was supposed to be 2-6-92. Bullets that hit bone were totally destroyed. On one, the biggest chunk was 70-80 grains. I still have it somewhere. Good luck!