The short answer is: it depends. RSSI, or received signal strength indicator, is a measurement of how strong a signal is at a particular location. The higher the RSSI number, the stronger the signal. So a RSSI 50 reading would indicate that the signal strength is pretty good.
However, there are other factors that can affect ring performance, such as interference from other devices or objects in the environment. So even if you have a strong RSSI signal, you might still experience some issues with your ring device.