Anyone else have problems with this brand? I bought the Beta Chrony last year when my 14 year old Pact PC2 went belly up and would no longer give a reading. Parts were no longer available for it so I elected to go cheap and got the Chrony.

All seemed well until yesterday when I started getting wild swings in velocity readings yet the 204R loads were grouping well. I go out of my way to insure I'm centered over the sensors and set the screens about 12 feet from the muzzle. I was getting variations in velocity of more than 225 fps. It was cloudy but, I followed the manual directions and did not use the diffusers. Up until yesterday, my readings have been, for the most part, fine if I install a fresh battery. A battery change did not help this time.
I've lost all confidence in Chrony products and ordered a Pact Professional XP, something I should have done from the start.

Tom