2 things to look at. Does it have an third screw under the stock other than the two receiver mounting screws. If it does then it is probably an older acustock. The newer ones do not have that extra screw. Savage decided it wasn't worth the trouble and folks were having trouble adjusting that extra screw. If it is an older one then it might have a 1-11.5 rate of twist in the barrel which is not optimum for using heavier bullets like 140's. I am talking old-new stock, a rifle that is new but sat in a store for a long time.

El Lobo