My chronograph is giving me fits and I hope you or some of your friends can come up with some good suggestions. Hopefully, suggestions as to how I can eliminate the problems with me present chronograph rather than, "junk it and get a good one." I have a Pact Chronograph that is about ten years old. It has the light diffusers but works better without them. I also have the printer that goes with the Chronograph.
One problem is with low readings in the 200 to 250fps range. These I found to be created by the cables attached to the bottom of the sky screens shaking in the wind, so I taped the cables to the mounting bar and that eliminated most, but not all of the low readings generated without firing a shot.
The next problem is high readings in the 1200 to 1250fps range. I found these to be caused by muzzle blast. Even when my buddy shoots next to me I get one of the high readings.
Both of these problems are not present all the time and I have been unable to identify the conditions or lack of that may be causing the problems.
I will be contacting Pact again about these problems. The were not very hellpful the last time I contacted them.
Any suggestions will be greatly appreciated.