I used 180 grain GKs in my .300 WM for many years, but IMHO they expanded too quickly, i.e., I rarely got an exit hole (which I like because it leaves more blood on the ground).
Five years ago I switched to Accubonds and have never looked back.
I agree with you to a point BTM. I shot a bull moose a couple weeks ago with 180 gr GKs out of my 30-06. The first shot was a frontal shot and the second and third were broad side. The 2 broadside shots were complete pass throughs taking out the lungs. The first shot entered high in the chest and from what I could tell, fragmented, the core lodging in the left back strap, and from what I could tell, a large piece taking out the left lung, traveling down the body cavity slicing through the liver and diaphram and ripping open the stomach then exiting out the belly. It acted about like that mystery bullet that killed JFK!!