I use an F1 CHRONY but cost is $AUD150 here
.It is a really good basic model. I can recommend the Canadian-made model to anyone!
I feel any chrono poses more questions than answers for me.
Why in heavens mame does an airrifle have 50FPS variations with same ammo? Rimfire .22 ammo is even worse!
Now I load with care and just shoot without a worry over velocity variations! Scores and kills have increased.
But nice to know my .224 " CF rounds are making 3,000FPS though - as if is useful for the HORNADY tables as regards bullet "drop" for crows at 200m+!