That would be my take.

I traded for an old 4" Colt .357 mostly because of its well-known local LEO provenance. I decided it wouldn't hurt if I shot it a few times before passing it on to the family of the lawman who had used it in law enforcement. I took along my chrono.

Using a favorite .357 target load, the Colt's measured velocity averaged many fps slower than the same round in my other 4" guns. Was a little disappointed to learn that the more famous of the guns I chronoed that day definitely DIDN'T "shoot hard".

Been hand-loading since '78 and rarely a week passes that I don't learn something new ref. velocities