I always thought Berger bullets were designed to frag and dump all their energy into the animal.
Thanks to your real world tests we get to see how they really do.
The Berger Hunting bullets are, at least some of them are. The OTMs are part of their 'tactical' line of bullets, supposed designed to fit into magazines (on reference I found) and with a thicker jacket to withstand the build up of heat in a barrel with can damage bullets (so was claimed). Either way, not great.