Ran across this vid from Mtn Tactical, explains some issues they see with Tikka mag problems, and some solutions. Shows some issues folk can encounter with aftermarket stocks and what is what in the way they're constructed too.
IE; I have a B&C that I'm going to have to inlet some more on the bottom, mag sits too low, have to re-measure, seems to me it was around 1/16 to 3/32 range.
Anyway, some stuff to be aware of;
https://www.youtube.com/watch?v=snNgbG_PnS8