Many thanks 'private fraser' for the link to measure, I will try it. Mine is not printed on the barrel as you suggest, Triffid. The barrel is marked thus :- CAL 223 REM. MADE IN FINLAND. insignia of left facing 'lion' then 3/4" gap, BNP , what looks like crossed hammers with digits 0, 1, 7 left to right then BNP. On the receiver it's marked TIKKA T3 433519 with the small lion figure again. There is no 12 or 8 after the .223 REM. Is my one an odd or have they changed the markings ? Hope I am not s*dd*ng up the thread.
Regards,
Gallmans