I don't have one but people seem to really think that the magneto speed chrony is the nuts. Uses a concept of magnetic field interference rather than light to measure the bullet's speed. In addition, it attaches to the barrel or suppressor, and is quite compact.
As far as pressure goes, the only way to truly measure internal pressure is with a strain gauge or copper crushing method; the latter of the 2 requires a hole to be bored into the chamber, which is quite unreasonable. You don't need to go to these lengths, unless you are a gun manufacturer or an r&d tech or something. When people are talking about the pressure of their loads in their rifles, they are most likely getting the info from quickload. It is not measured, but predicted. Close, not exact, but all you need is a handle on where you are.