a good friend of mine had one, 18-20" barrel I think, wood stock, flat out pretty. He fed it nothing but the 147 grn nato stuff, off bags we managed solid 1" groups on the peeps.
The best five shot group I've ever shot was with that rifle, 100yds, iron sights, quarter sized. He used it for 300yd steel plate shoots routinely. Eventually he sold it, I still miss it thought!
FWI he had a scope, mounted like the one on post#24, good brand, lock-tite, good rings, that would hold for about 50 rounds and then became different bay erratic. I would certainly start there.