Boxxer, I have owned and used Encore rifles and handguns since they first came out and have never owned one that would not shoot more than an inch at 100 yards. And that was without tuning of any sort - after I spent some time playing with them, many would should about 1/2" or so. I am sorry to hear of your experience, I would suggest keeping in touch with T/C as they do stand behind their products. If I can help, drop me a PM and I will try to help.