The twist rate is 14"
Someone at the Sako collector club might know.
You will have to contact Sako. Falls outside published data.
The Sako L461 Vixen in .223 caliber typically has a rate of twist of 1:12 inches. This means that the rifling makes one complete turn every 12 inches of barrel length. This twist rate is suitable for stabilizing lighter bullets commonly used in .223 cartridges.
Need a DETAILED DESCRIPTION OF ALL MARKINGS to answer.
1-8 or 1-12
1/14 IIRC. Have it verified by a gunsmith
No known published sn data in the US
SN 128273 was shipped in 74 and SN 152027 was shipped in 78. Best estimate would be it was made in the 77/78 time frame.
No sn data published in english, 100-1000 depending on specifics
1/12 or 1/14.
I have a sako L461 serial no 97578. This was purchased in 1968 , so, I guess no 86302 would be somewhat older.