Used a 90 Skinner once in a .240. Chest shot a WT doe at a hundred yds or so. Liquefied the chest cavity, even had corn floating around in the goop. Solid chest hit, not even close to the diaphragm.
Clean up was such a mess, never again used that bullet on a WT. May be OK at .243 speeds but I don't have a .243, the .240 is my only 6mm.
Was a DRT, BTW...
DF