how much to mill head to reduce cc's

[OUTLAW]

I had this infomation and lost it -but does anyone know what the ratio to head cut to cc reduction on a head

To clarify How many .001 milled off a head to reduce combustion chamber volume by 1 cc

[Chryco Psycho]

I don`t have it handy & it cahnged depending on which head you mill as well , basically if you mill off more than .050 you have removed too much metal & you have not increased compression significantly either