I have a Oehler 35 p and also a magneto speed and use both of them. The Oehler is the final word if I question any other chronograph velocity. I personally like the ease of setting up the Magneto speed and use it the most. Nothing seems to bother it and the velocity accuracy is spot on.
I use it on rifle, pistol, shotgun and bow, so it is very versatile. cant say anything about some other brands of chronographs due to lack of first hand use, but the times I have been with others with other brands, I was very happy with the two I have.
I don't think that others can be more accurate than the two I have and so far neither has given any problems. I personally don't want/need anything else.
Just my opinion
J E CUSTOM