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You can test precisely where the bullet will fly in relation to the sensors and your point of aim this way: (I describe a much more elaborate set of steps than necessary so you can visualize what is going on. Take shortcuts as you wish.)
Make a second chronograph out of cardboard and duct tape.
Set it up (with screens and everything) where your real chronograph will be placed.
To each screen, tape a sheet of clear plastic so you can see the bulletholes of the bullet's flight path.
Weight the cardboard chronograph down so muzzle blast or the tearing of the bullet through the clear plastic will not move it.
Fire a round over the cardboard chronograph as if it were the real one.
Evaluate the results and change your point of aim as necessary.
When satisfied, shoot over your real chronograph
Same thing golfers do with practice swings.
My Chronograph wears channel iron, angled to deflect bullets. It (the iron) can take a low-angle hit from a full-power 500 Smith & Wesson without damage.
Good luck, Thanks for asking our advice.
Lost Sheep
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