1/2 MOA @100 is going to be a coin flip with ANY factory built rifle. And not a very good coin flip either. 3/4 to 1 MOA is about your average from the upper end of the factory offerings. A good bedding job, trued action, top quality optics, top quality rings and bases, a trigger job on 99% of factory models, would be necessary on most any factory produced rifle to have the accuracy you are wanting. Not to mention you will more than likely need to learn how to reload your own ammo to tailor a load that your rifle will like to eat. By the time you do all that you may as well have shelled out the extra money for a custom build. But another question comes to mind. Are YOU capable of that kind of accuracy? I see a lot of folks blaming the rifles when in reality they aren't capable of holding minute of barn!