Acceptable Casting Loss

Hi all, We cast many large 9" trees each day, mostly in 14ky but some
14kw, 18ky and Sterling. We use a Neutec J-10 casting machine, both
for casting, and for re-graining. Would you please give me your
opinion on an acceptable percentage of metal loss for one or both of
these processes. Thank you, J.D. Wriston