Probably a lack of demand, SweetWilliam. I am guessing lots of folks would look at a bullet that cal and weight for use in a 45-70. .452 just might be a tad too small (depends on gun, of course).
I don't expect there's a whole lot of folks that shoot that heavy a bullet from revolvers. I do, but I pour my own for a third of that price.
I am thinking about it, just to play with the alloy. Are you close enough to Akron for face to face, if I decide I want them?