I am a bit confused with my new PRO Chonograph Digital. It seems to read velocitys approx 100fps slower than my Chrony F-1. (That met an untimely demise)
Here are a few velocitys that were chronred on the F-1 and the Pro Chrono.
308win- 26"bbl, 45.5gr Varget, 175VLD
F-1= 2750, PC= 2650
308win- 26"bbl, 45gr Varget, 175smk
F1=2725, PC= 2625
2-223Rem- 26"bbls, 25.5gr Benchmark, 55gr BK
F-1= 3350, PC=3250
7mmRemMag- 28"bbl, 63gr RL22, 180 VLD
I never chronoed the load below on the F1.
300wsm- 29"bbl, 68.5 RL19, 190VLD
I then tested a friends 308win:
24" bbl, 45gr varget, 175smk
PC=2560, I figured it should be 2650-2700.
I used the 7mmRemMag and the 308win @ 800yrds 2weeks ago and they both supported ballistic charts that I made with the data from the F-1.
Anyone had a problem like this before?
Which one should I believe? Im guessing the F-1.
Any help would be greatly appreciated.