Re: *new* magnetospeed v2 chronographs
This is a great idea for a chrono. I built one very similar to this a few years ago. (I am a circuit design engineer by trade.) This barrel mounted design has a significant advantage that wasnít even mentioned, namely it eliminates misalignment of the bullet path to the sensors. With anything other than perfect alignment a conventional chrono will always read slow. To quantify this, a 10 degree misalignment in yaw will result in a reading of about 2,950 fps when the actual velocity is 3,000 fps. A 10 degree error is pretty big and would be visible but it illustrates the point. Other advantages, it eliminates the problem of hitting your chrono and you donít have to have the range go cold to set it up.
Anyway, it was a fun project but I donít use it due to one small limitation that was important to me but may not be to others. When you hang a weight on your barrel it will change the point of impact of the bullet. I was seeing a 10Ē change at 100 yards! That was a complication I didnít want to deal with since I am usually shooting to check not only the velocity but also the accuracy of various loads I am developing. If you just want to check the velocity of ammo that is already developed this is a nice way to go.