It is still possible to get copper to fragment into pieces and lighter versions with shorter shanks (low SD) can leave not much left but fragments.I guarantee you'll never cause a solid copper shank to explode completely into fragments. I feel confident to guarantee that the trophy bonded tip and woodleigh weldcore will never just pencil though at anything over 1800 fps nor will they blow apart regardless of velocity. I guarantee that the massive plastic tips on the 30 cal 225 eld m and 195 tmk specifically are covering massive hollow points on thin jackets that result in all hell breaking loose inside the body cavity even well under 1800 fps.
I feel there's no guarantees of anything with the tgk/gamechanger design in comparison to many other options. Not saying it won't work (It obviously does).
Again, thanks for all your documentation of bullet sections on our behalf.
Here are some examples:
All bullets have limits and particular considerations to take into account. Understanding those things so you can make an informed decision and bullet selection is what's important here and the main point.