Muzzle velocity Deviation
Does anyone have a good rule of thumb for computing fps deviation when the temps rise or fall? I know this varies based on what kind of powder we are using but I need a ballpark number.
When using exbal I cannot simply tell the program that I am zeroed at say 0 deg. I am zeroed at 60 deg with 2950 fps
If i tell it I am "rezeroed" (which I am not, I am a bit low) at 0deg I at least need to adjust the muzzle velocity correct?