I had a Chrony Beta Master for a long time. It was the worst piece of junk I could have spent my money on. It was consistently wrong and by the time I noticed it I was getting abnormal readings of 150-200 fps..
I trashed it and purchased the Pro Chrono Digital with the remote box and could not be happier. It will even read a rubberband gun in the den lights. It was under $200 total and the best chronograph money I have ever spent.
I also had an Oehler 35P but it was way too much set-up hassle and not very accurate or reliable. I once considered another 35P but they can't ever decide who is worthy enough to purchase their products.
The Pro Chrono is good stuff !!
Competition Electronics ProChrono Digital Chronograph - MidwayUSA