DEEP CUT FOR BALLISTICS FANS!!- DROP/DRAG SCALE FACTOR with Todd hodnett - Trans/Subsonic range

STEPS TO FOLLOW ON YOUR KESTREL BELOW: STEP 1: To calibrate DSF, first ensure MV has been calibrated correctly, then enter the Gun submenu, scroll down to Cal DSF… and press select. STEP 2: Just like in the Cal MV menu, the top line of the Cal DSF screen shows the recommended range at which to calibrate DSF which is the distance at which the bullet reaches Mach 9. Calibration should take place at a range at least 90% of the distance to the recommended range. Calibrating at less than 80% of the recommended range will result in an invalid calibration. The second line says Range…. Scroll left or right to input the actual range at which you are calibrating. STEP 3: The third line is Drop…. This is the point of impact calculated by the Kestrel based on the inputs (including WD and DoF) already entered into the Kestrel. Input the equal but opposite elevation hold to correct for the calculated drop into your scope. For example, a point of impact Drop… of 10 mils would require inputting an elevation solution of 10 mils up. Take a few shots to establish the actual point of impact at the calibration range, and then adjust .. to match. For example, if the point of impact is 0.5 mils high, subtract 0.5 mils resulting in a new Drop… of 9.5. If the correct wind values have been input, you can ignore how much the bullet missed to left or right. STEP 4: Adjusting Drop… will calculate a new Drop Scale Factor (DSF) value which will be indicated by a +/- depending if the new DSF value has been calibrated up or down. Pressing exist and accepting the new DSF value will automatically add it to the list of up to 6 DSF calibration points that can be created to calibrate DSF through the transonic and subsonic range of the bullet. A single DSF calibration exercise can create more than one DSF data point. If a new DSF value is created, any DSF values measured at lower Mach numbers (typically shorter distances) will automatically be deleted. All DSF values can be viewed and deleted in the View DSF… STEP 5: After calibrating DSF beyond the transonic boundary, confirm your data by continuing to shoot at further targets. If holds become inaccurate at a longer range, run the Cal DSF function again to add a new DSF calibration point at a lower Mach number. https://ift.tt/2YJVibT Kestrel Weather Meters August 04, 2019 at 08:55AM