http://www.gpiprototype.com/?gclid=CN3FwKfu77QCFQ-f4AodGFAA8w
Direct Metal Laser Sintering - I don’t know if the result is suitable for use in a magazine, what little I know about sintered metal is that it might be too brittle, but these things are progressing rapidly.
Sounds too me like a candidate for home making frangible bullets.
Very soon I expect people will come up with a new 3D printed caseless ammo, whole thing is printed, fill with powder and add primer. A longer lighter bullet because the case is part of the bullet, and it disintegrates upon impact, nothing but sintered metal fragments, much like the new varmint bullets.