ET, with the right meplat, the damage the LBT type bullets do can be impressive.

And, you are correct in stating that a 400+ cast or the 400 grain speer will kill things. With authority.

Perhaps one of the best bullets I've used for killing deer has been the 300 grain Speer UniCor at just under 2200 fps. That's an impressive bullet that does not do excessive damage at that speed. That bullet holds together well enough that I wouldn't be afraid to use it on Elk or Moose.

I still like my LBT bullets, using them in a .44 mag and my .45-70. I've not had deer run any further when double-lunged, and I know I can break runnin' gear from any angle