TRex, don't over think the application. I killed a lot of cow elk with 243 and 100g partitions, and two big bull elk with 7 Mag and the old 140g nosler ballistic tips.
Speed with bullet expansion equals stretching with permanent wound cavities.
Permanent stretch cavities are created at 2200 fps, otherwise you are punching a hole.
Elk are not hard to kill, but a bad shot equals an unbelievable tracking job with many ending up feeding the lions and bears.
