Home Forums Hunting & Shooting Long Range Hunting How accurate are the 'fold out' chronys?

I set two up in tandem, an RCBS unit and Chrony F1, and fired several strings of different calibres through them both, comparing the readings.

There were not any wild fluctuations shot to shot, and the readings were consistently close with the F1 generally reading about 15fps faster. Loads were 270 Win, 7mm RM and 308 Win.