I have the clear impression from numerous phone reports that
95Pd/5Ru is a terrible lost wax casting alloy, nearly impossible
without some issue or another. Can you possibly change to a 950Pd
that is really made for lost wax casting? That is available from
PMWest as well as others of course.
Using a temperature of up to 1400C, a flask temp of 1000F and
maximum torque on a commercial induction caster has led to good fills
on a variety of shapes.