RE: Sako Question ?
Following up on what handloader said, the used value on Sakos vary depending upon the time frame they were imported in. During the Garcia years, some manufacturing steps were modified to keep costs down.
Barrel life is highly subjective. A benchrest shooter may tell you some calibers only have a barrel life of 1,000 to 1,500 rounds before they aren' t competitive anymore. I' ve had 22-250' s that I felt were " shot-out" for what I consider acceptable varmint accuracy at 2,000 rounds or less.