Is it a Finnlight? I had a 300 WSM
in a Finnlight that didn't shoot good enough for me. It was fine for most, but I like to shoot bug eyes. That rifle stuggled to shoot a MOA at 100yards. I have had many othe Sako 75 S/S that shot very well though.
Seems to be a bad one in every bunch.
For $800 I'd be more inclined to ditch the barrel for a new one. I know in Canada I could have a Ted Gaillard barrel installed for less than that. He is well known up here for building very good barrels.
I have 4 rifles with his barrels & everyone is great.