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Reply to "Zero Gun Test"

The zero is to see that every thing is working and set correctly. If the zero is out side the .001 you are to figure out why and correct it before the first race. As mentioned bad sensor is likely the cause, with some other camera systems could be N.O. and N.C. options are switched. Could also be that the rules for rounding are not properly set in software. Some shells have a pre burn where the primer kicks out the powder which shows in the photo but is not loud, then the actual powder burns and makes the loud sound.
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