Magnetospeed V3 Question

LC 6.5 Shooter

Apollo 6 Creed
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Minuteman
May 29, 2018
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League City, TX
Awhile back my magnetospeed speed quit reading on normal sensitivity and I increased sensitivity to 5.

Now it is like 20f/s slower than a labradar. And my dope lines up with the labradar. Do I need to send it in? Do they often need calibration?
 
Battery. Change it.

Guess I'll edit as to why. When battery gets low, it does what you describe. Yes it powers on and works, but doesn't have the juice to read fast enough.

Yes thats when it first happened when the first battery got low. I replaced with a brand new but it was still getting an read error on normal sensitivity. So I turned it back to 5 and it worked again.
 
Im going to the range this weekend. I will try to put a brand new fresh battery in and see if it works on normal sensitivity again.

Why does it have the sensitivity option anyways. Is that for a smaller caliber like .22?