Moves no matter how much you torque the single screw - Browning Rifle Scope Rings

I purchased Talley scope bases and rings for a new X-Bolt 300 WM based on Browning's recommendation. The mounts seem to tighten up well to the gun but the rings can be moved left to right 1/8 inch when setting the scope. Unfortunately I did not realize how much these rings loosened after only a couple rounds so I assumed my mid-range quality scope was the problem. Hundreds of dollars and a new scope later, I realized the rings would move no matter how much you torque the SINGLE screws (maybe that is the problem). I have resorted to checking the screws after every shot or two. This product gets two stars only because the rings are steel - otherwise, the score would be even lower. Extremely disappointed given the cost of this setup.