I also like"softer" bullets above 130gr when dealing with cases like the 308/Roberts/Creedmoor, but tougher ones when shooting smaller and lighter bullets at speed in the 6mm/.257 class. I say this because a typical cup/core or bonded bullet of moderate weight works pretty well and disrupts vitals nicely while providing exits and blood trails more often than not. My history with 6mm and .257 cup/cores was not what I'd hoped for, regarding penetration and exits, hence the switch to tougher bullets there. I still shoot a rather soft bullet in one of my 7mm-08 carbines, the Speer 145gr BTSP, making 2,700fps at the muzzle. It has been impressive so far on anything hit in the lungs, with lots of blood and lung matter to trail by. I've stopped two of those bullets on bucks with double shoulder shots, but both deer never twitched after the shot. I'll still use them.
