In My experience...
Butch, what does it take to be competitive in the factory class? What size groups?
After near twenty years of running Hunter score matches which also allow factory class rifles at the Austin Rifle Club, it takes a score of at least 235 and above to be competitive. In the last few years the Remington and Savage sniper type 308's and Savage rifles of any caliber have dominated with scores of 235-242.
In my opinion, really competitive scores are never shot with "factory" ammo consistently. One had better learn to reload and find the load one's rifle likes. One may win a couple of factory class local matches, but when the next lot of that factory ammo comes into play...anything can happen. Factory rifles seem to reach a plateau of accuracy and that's as far as they go without extensive modification which takes them out of the factory class and into the modified class with questionable results. Sometimes great...but sometimes with very little improvement.
To illustrate:
Jan 2010...1st place factory; 226/1X, 220 Swift, Savage
Feb 2010...1st place factory; 193/3X, 223, Savage
Mar 2010...1st place factory; 234/2X, 308, Rem
In the last three years we've had five factory shooters move up to Benchrest Hunter rifles with excellent results.
However...if what you state regards your Sako is true and consistent, you ought to win many matches with that rifle.
Virg