Sako L581 in .284 Win. The 581 was a prototype distributed to gunwriters in USA for evaluation. Original caliber was .308. Comments were negative and gun was never marketed. According to Sako rep, Col. Charles Askins did not return his rifle. Back then this seemed to be accepted by the manufacturers. Askins had his gun rebarreled by the looks of it and the action reworked to .284 Win. I found the gun on the 'net with an authentication letter from Askins and bought it.
