I would imagine speeds would be slow, say max 2400ft/sec. Pen etration should be awesome but expansion would depend on the bullet. Something like a Barnes, if such is made, would be minimal expansion. Purpose built like that rare woodleigh is probably designed for something like Feral Cattle or Asiatic water Buffalo. That bullet would work best with the resistance of something like those animals, although I doubt an average Bear would utter a word of critique on the performance. Another excellent and bullet would be the 220 partition, the front should open rapidly, with the rear pushing it through for excellent penetration.
The only down side is trajectory. In an area of tight cover or tree stands, this idea would be excellent.
Another use is for defense. I've shot 235grs out of my 375rum, and had some 300gr partitions up the pipe while I'm gutting. Slightly different point of impact, but the 300gr load is for close/ close range.