It's a 0.4mm depression in both SR (2.9mm) and LR (3.2mm) depth primers..... which is enough to achieve ignition in any decent make of primer.
Perhaps the reason that no-one's replied is that this is governed by the firing pin taper and the spring collar which are factory set.
It's not measurable in the ordinary sense as the pin only protrudes beyond the bolt-face on firing, or releasing the mainspring on an empty chamber by simultaneously pressing trigger and releasing the cocked bolt-handle. Any protrusion is concealed within the chamber so it's a bit of a mystery as it's dark in there
Of course, none of this is news to you or anyone, so I'm struggling to understand the reason for your question. Look at:-
http://www.tikka.fi/pdf/manuals/tikka_master.pdf
The 'exploded' parts diagram - PDF - Page 34 - Part (14) - shows how it all works automatically providing of course that you use the right TIKKA parts. The engineering is sound, but I'd imagine that most rifles follow the same basic pattern.