I doubt that contraption would work the best on some good hard Osage Orange.
Or elm, or beech, or any of the trash oak we burn in the stove.
I can assure you that this contraption does not work on American chestnut either!
Back when I was a strapping youth and trying to spit some American chestnut trunk for us to burn in the house, I would pound that axe flush with a sledge - and the round still didn't split sometimes.
/John
