Edgunn leshiy 2 177 cal

I have a pre-order in for an April delivery for a. 177/250mm. The specs I want to better understand relate to 

  • regulator capacity (adjustable) is
    • 80-160 BAR but there’s a working pressure of 90-300 BAR…what’s that mean and what is the practical value to the shooter? How do those ranges and factors influence function and performance? What is a recommended fill pressure?