The accuracy potential for your rifle is excellent. You must find the load it likes.
I bought one of the early Vanguard Synthetic ( which is essentially the same rifle). I know nothing about factory ammo. Among the rifles I own only one has ever fired a factory round. Since I found the load my rifle likes it has been "lights out". My experience with both of my 25/06's has led me to 100gr bullets for whitetails; one likes Partitions the other(a Savage 110fp) likes SMK's. If you don't handload the best I can suggest is to try a variety of ammo.
I am sure that you will find what your rifle likes.
GOOD LUCK and GOOD SHOOTING!!!
If you're gonna get old you better be tough;Gettin' old ain't for sissies!!