Now that I have a little more time Ill explaine this a little more. Tuners do work in the manner that they have some effect on the harmonics and can bring a load in and out of tuneish. But you can get into trouble. In my opinion the correct way to use one is to fully tune you barrel first. By that I mean you have extracted all the accuracy possible from your barrel. Then you adjust the tuner. If you improved your accuracy by any measurable amount then you didnt have the tune right. The best advice I can give is dont try to cheat the real tune. It will let you down. Unfortunately you have to put in the real work if you want a really good shooting rifle.