I got what I consider to be fudged chrony readouts, usually my chrony will indicate 'dup' if a velocity repeats, but I had some shots just keep displaying the previous number, and all I can think of in my case is there was too much muzzle blast at five meters. I think I must go to 10 meters for 100+ grains of powder.

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10 m, ?????????????????????? lot a folk shooting revolvers will find the chroni being hit ever so often  ;D  ;D  ;D  ;D  ::) I see some very wide results at the range with 38/357 owners, very wide and very high low.

Those who have difficulty shooting the bullets through the sky screens, could always place some bullet proof objects in front of the chrony's "vitals".  An angled plate, for example, may help to prolong it's useful life span.