I have been using the Magnetic V-3 for a year now,
after I figured out how to set the sensitivity levels, and get the spacing over the bayonet correct,
had to make several different thickness spacers, to cover all the different bbl sizes.
It will pick up steel bb's and 22 cal pellets every time, and has never failed to pick up all CF cal from 17 thru 45 cal,
plus it is also easier to set and use than my Oehler chrono, when I set up both for double checking ballistic etc.
Well worth the $$$, IMHO.
Tia,
Don