Are the errors recoil related, or from you mounting the rifle? I ask because I feel the Garmin is finally a solution to me getting chrono data for my 50 without mounting my Rube Goldberg Magneto Speed rig to what is already a monster of a rifle . The 34" barrel makes me think I will have to rifle mount the C1 to get it closer to the bore not to mention the, shall I say generous tank sized muzzle brake.I have seen behavior like this or assumed that’s what happened when the Garmin missed a couple shots when I had it rifle mounted.
I refused to buy a LR but have a MS, and a Bulletseeker/SpeedTracker getting repeatable data from that one rifle has been a PIA.