Inherent accuracy is about the barrels. One rarely finds a gun with a bad barrel. Most can shoot better groups than the shooter, even when he uses a rest! The difference in the "Achieved"
accuracy of factory guns is often a function of the QUALITY of both the LOCK, and TRIGGER(S).
The final variable that is rarely discussed is the shooter's training, and capability, to shoot iron sights accurately. With the advent of inexpensive scope sights on modern guns, its rare to find many shooters under 60 years of age who have much experience, much less training, in how to shoot iron sights accurately beyond 50 yards. Off-hand shooting skills are non-existent with most younger shooters, as they prefer to use a scope rather than do the long hard work to learn how to shoot tiny groups at longer ranges using iron sights.
The sad irony is that if they simply did dry-firing practice looking thru that scope sight, and then did off-and shooting at 100 and 200 yds., they would have fine skills for shooting iron sights, too. The higher the magnification of the scope, the more those crosshairs wiggle and dance with every heartbeat. Learn proper stance, hold, breath control, trigger squeeze, and follow thru to slow those dancing cross hairs, and they could be very fine off-hand shooters with any kind of sights. It just takes practice to earn to shoot iron sights as well. :hatsoff:
Oh, many factory sights are less than optimum for most shooters. You need to see daylight on both sides of that front sight when looking over/thru the rear sight notch, regardless of your age, or the condition of your eyesight. Open up that rear sight notch or change the sight. :shocked2: :thumbsup: