Easy peasy. 405 grain Woodleigh. 1) They are bonded so cling together 2) The lead and copper are brittle enough to lose some weight thus NOT maintaining a huge mushroom that limits penetration. This gives them a great combination of expansion, wound channel and penetration. At the velocities we are talking about the 350 grain Hornady flatnose with interlock is also a winner. The old 300 Nosler Partition which has been discontinued was truly amazing but now long gone. I made a video on this topic 4 years ago if you are interested. I have also testted the 400 Speer and it is really soft and the enormous expansion reduced penetration. I have also tested 440 grain Hard Cast bullets with a wide meplat and while they penetrate through a huge amount of tissue the wound channel is quite a bit less.
https://www.youtube.com/watch?v=P5nd2uuhaMA
