just a note on the magnetospeed, love mine but it shifts my poi big time on my 300 win mag 700 adl here is a target, i shot 2 3 shot groups testing a load then put the chrono on and tested the velocity of 3 rounds. i was aiming at the bottom right target. it shifted the poi 6 inches up.
i had to change my load development procedure from the standard chrono i was using. now i run a pressure ladder with chrono to check speeds and pressure signs. then i load up my ladder find the load then test it and recheck velocity i just to look for accuracy on the velocity rounds.
enjoy it i love how easy it is to set up and go and you don't have to worry about the wind blowing it over or sun in the sensors or any of that stuff.