Not for a shotgun. Otherwise mine worked fine. The weak link is the device that attaches the "bayonet" to the barrel, particularly if the barrel is tapered, which many are. It tends to work itself off the end of the barrel, where it can be shot by the bullet. Don't ask how I know.
Had a chance to see the LabRadar unit today. Pretty slick unit.I bought one from Cabelas and the mount didn't fit well on any of my guns. I sent it back for a refund before I ever used it. It may work great but the 49 cents they put into the mounting hardware scared me away. I ended up spending a lot more and can totally recommend a Lab Radar unit.
I have tried it several times with shot and never received a reading. So, I can speak from my experience and say it has no accuracy at all.The LabRadar unit isn’t listed for shotguns, other than slugs. Can anybody speak to its accuracy with shot?
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I was repeating what I was told by a person who owns one. He has various caliber rifles, from 17HMR to 30-06. He said the device measures velocity of 17 or 22 but not at the distances he wants.I don't know why the 'small caliber' limit comment came from the Labradar folks. I've not had any issues with mine and have used it from .22 through .50, plus 12, 16, and 20 gauge slugs. No issues. Nice to be able to get speed data as the projectile travels downrange as opposed to a single point of speed data with other solutions.
Agree on single projectiles vs. shot string. I think the Doppler dispersion from the various parts of the string separating causes the unit to fail to lock. Fair enough - it's a complex target from a RADAR perspective. A shot string from the perspective of a more traditional chronograph is far easier to deal with - 1st optical interruption over the start and stop gates is all it cares about, with a dwell time before it is ready to take the next measurement that's longer than the remainder of the stream will persist over the gates. Easy from an instrument implementation perspective.
For rifle and pistol, the Labradar is great. For target shotshells, I purchased a Prochrono DLX. Was under $110 on-sale and has BT connection to your phone to take string data. Works great for an inexpensive solution.
I've had two friends with Magnetospeed units. One had an attachment issue which caused the sensor to get impacted by the projectile. The other said the speed data he received appeared accurate for the rifle rounds he was testing, but the POI @ 200 yards changed when the unit was attached, likely because of the deflection caused to the pressure wave at the muzzle. He was trying to get both speed and grouping data from the same test rounds and it didn't work out.