The title pretty well sums it up.
I've got an old set of drawer pulls I have to recast and repair components of, the original castings are some sort of copper alloy and the handles have broken off all but one. My preference is to cast replace the broken sections with recast parts from phosphor bronze, problem is the only source of phosphor copper has a minimum order of 5lb when I'll need FAR less than that. I've got plenty of experience casting and the facility to do so, I just don't do phosphor bronze until now. If the phosphor bronze isn't feasible, I'll probably run straight bell bronze.
Wikipedia tells me "It is produced by a high-temperature reaction between diammonium phosphate and copper(II) oxide."
This leads me to suspect I could simply stick copper and DAP in a crucible in the appropriate ratios and apply enough heat to melt the Cu, hold temperature, then pour off as shot.
Is anything jumping out that I'm not seeing here?