New to the forum and long range hunting. I just bought a Leica Rangemaster 1600 and need it for an elk hunt in three days. I want to use the pressure readings to get the true barometric pressure from this device so I can use it for my BDC calculator. Right now I am in Denver and it is giving me a pressure reading just above 12. Wheather Underground says the preasure is 30.48. My ballistics app says the preasure is 30.04, virtually the same as Wheather Underground. What am I missing? Is the Leica Rangemaster using a different measurement or is it giving me a false reading. Leica is closed until after my hunt for the holidays so calling them is out.