With the LR308 the only limiting factor is the ammo , the scope and a match trigger (3lbs) .I can tell you that with "bench rest" case prep using 168 and 175 match kings CCI BR large rifle primers,winchester cases,Varget and my 6x24 Sightron
Target scope I have shot a lot of groups at 100 yards that are 1/2 inch or better
Using harris Bi-Pod and Protector rear bags going prone or from a steady
bench rest
If you don't reload the Federal GM 168 and 175 will shoot almost as well,
also Black Hills Match ammo in same weights will do the same
Properly set up the LR 308 has outshot many "Tactical" rifles I have seen at
the range,could be that the weight and semi-auto action soaks up much of the
recoil making the rifle very easy to shoot.
Remember in a bolt gun we have
many factors influencing accuracy that the LR does not have like bedding,stock
balance , barrel pressure on stock or free float ,etc
Later-
John