I am working up a load for lion in my 375 Rum. I have only hunted with TSX in this cal. I know that a TSX would work but from my experience penetration is fantastic and it is a sure killer. My issue is that it is not a fast killer it leaves a small hole. It is a great bullet for big animals that slow the bullet down, and non-dangerous PG you may have to follow a few yards but it will be dead. I was thinking I should use something that will transfer energy better for a quicker kill on lion (more likely to keep my hide). I was thinking of 300 grain Nosler Par. or Accubond. the Rum will throw these at around 3000 fps. I want to kill quickly, but don't want to much damage to a very expensive hide. What do you boys think?