That's why we need home pressure measuring equipment. The chrono doesn't tell us pressure, only velocity.
It is a good tool to give us another check on the consistency of our process and our selected loads. It's just not a "must", even for serious reloaders IMHO.
And yes, I have used one. Thought it was more trouble than it was worth...
Proud member of the NRA and Texas State Rifle Association. Registered and active voter.