Came across Sako ammunition in a guns shop today which had the box marked as subsonic and also full metal jacket ( head was was purple and tip of bullet head looked rather like ballistic tip).
This was 185 grain in .308 calibre. I could not find anything authoritative about the ballistics of this ammo. Anyone know? Also - if it's full metal jacket, then is that legal for deer and does it count as "expanding ammuniution"??