Hi guys, I'm new here, awesome site! I am from South Africa and have 2 Sako's. A M85 in 30-06Spr which shoots 0.5MOA if I do my bit and a L579 in 243Win, which is causing me some troubles. The L579 I inherited from my grandfather who passed away when I was 7. The rifle serial number is 349XX (5 digit number) I have 2 questions, if you guys can please assist me. 1. When was the rifle manufactured (from the reference section, it seems around 1964?) ? 2. What is the rate of twist for the barrel (I can't get a decent measurement using a cleaning rod and patch)? I see general consensus on the site is that it should be 1 in 10, but I don't know if Sako ever deviated from this. I can't get decent groupings with Nosler Ballistic Tip 95gr bullets (the only bullet I can get in bulk at a decent price in South Africa). Thanks for the great site! Roeltru Ps. Sorry for the semi disjointed post, it's a bit about me and my rifles and my problem child rifle!