I haven't done anything further with this bullet, in the way of testing, hunting, or R&D, since my last updates.
However, I figured I'd add a video of a water jug test done by "mt sourdough" on the Marlin Owners forums.
275 gr Bonded version, at 2160 fps.
mt sourdough noted: "
It is possible that this is the hardest hitting 44 cal bullet that I have tested in this weight range." (He has tested over 80 bullets in .444 Marlin, with the majority in the 250-300 gr weight range.)
http://www.youtube.com/watch?v=eIWmMt7685s
It doesn't penetrate quite as far as some of the competition (by a jug, or so), but it hits
hard.
If you like cast bullets....
At the opposite end of the spectrum, is a video you may find interesting, if you've seen anything about the 427 gr bore-rider bullet I designed for my .444 Marlin. It is the best-penetrating bullet he has ever tested.
427 gr Bore-rider @ 18 BHN
1470 fps
http://www.youtube.com/watch?v=-jwjVxIJV-s