Yeah, I meant "Telekinesis" and not "Teleport". Srry
You could shrink about 1 cubic meter of material.
1 cubic meter platinum weighs 21.450 Kg (about 43.000 pounds)
Shrunken it weighs 10,75 pounds and could be thrown with teleKINESIS ;)
when it hits or when I speak the command word (free action I guess) it goes back to being a 21.45 ton thingy.
Telekinesis states that I do 1d6 points of damage per 25 pounds (hard dense object) = 1720d6 points of damage.
Still quite nice for an exploit (which should not be allowed ofcourse)