Wouldn't most accuracy problems be attributed to the person or the ammo and not the gun itself?
In actuality, . . . YES. Unless you have exceptional shooting skills, . . . the gun will outshoot the shooter every time.
The other posts pretty much summed up the "problems" that can occur, . . . but by and large, again, the gun will outshoot the shooter.
Most of the time, when there is a problem, . . . it is either something that can be fixed quickly, easily, and with little expense (loose sight, wrong rings on scope, etc), . . . OR, . . . big money and investment.
Tweaking will help many guns shoot better, . . . but not until the shooter can outshoot the gun.
May God bless,
If you can breathe, . . . thank God!
If you can read, . . . thank a teacher!
If you are reading this in English, . . . thank a Veteran!