FX FX STX Superior Heavy Liner specs

[anorphirith]

Hi guys.
Did anyone measure the diameter of the groove and bore of the FX STX Superior Heavy Liner in .22 ?
Also do we know the latest twist rate of the 800mm version ?
Thanks !

 

[DesertSilver]

Which caliber. I believe my.22 cal stx heavy has a groove diameter of.2175 so I'm shooting.218 sized cast slugs I cast myself. They're NOE 30 grain BBT slugs cast with pure lead.

 

[anorphirith]

sorry it's for the .22