I have theCompetition Electronics ProChrono Digital Chronograph - easy to use, accurate, good price -very pleased. Minorpeeve the fact the face/display can't be removed for shooting saboted loads from a ML. I'veseen what happens when a sabot connects with the display and it ain't pretty. Shooting Chrony Masters have such an option though I like the ProChrono(having used both).I just place a stop in front of the screen(brick actually

) and review the data after the group - it holds 99 shots so no biggie!
Good luck