We will need the following details to help you:
1. your console and game
2. mouse DPI/CPI and USB report rate, mouse model and producer
3. settings in the game on console, such as: sensitivity, dead zone, acceleration, aim assist etc.
4. which config has been activated in ReaSnow S1?
your settings for HIP/ADS /HIP YX Ratio/HIP MIN/ADS YX Ratio/ADS MIN/curve in this config
5. ReaSnow S1 firmware version and APP version
generally speaking, 5000dpi/500hz are recommended.
"Optimizing Mouse Control" in this topic:
http://www.reasnow.com/forum/index.php?topic=2612.0might also be some help for you.