My M4 seems to be reading slow compared to me Lab Radar. Let me start by saying in the past I was testing inertia trigger devices on my Lab Radar and compared my LR to another LR and a Magnetospeed V3. They all three read witching 2-3 FPS shooting my GT in the 2950 range. That said my M4 is reading slower than my LR. I’ve shot it on two occasions and it happens both times.

One string yesterday had individual shot readings from 11-22 fps slower on a 10 shot string. Every shot recorded lower than the Lab Radar. From all the videos I’ve seen comparing the M4 and LR it shouldn’t be this high of a difference. Another string I shot had a difference of 11-54 fps slower. Another shot string had recordings from 20-65 fps slower.

I understand I will not get exact readings every time, or even most times, but this is extreme. If it was a fairly consistent amount per shot difference I’d right this off as a programming difference. I love the concept of the Bullet Seeker Mach4 but mine seems to be defective.