I have a cva optima with their dead on rings. I put a nikon inline xr 3x9-40 300 bdc on it. I got it zeroed in with my old rounds i was using. When i switched to my new stuff it shoots alittle over 7 inches high. I tried to bring it down when it went from shooting great groups to nonexistent ones. Did i max my elevation out, and if so what can i do to fix that.