A friend bought a chrony recently and we finally took it out and had some fun.
Shooting a series of Pistol factory loads and then a set of my pistol handloads was quite enlightening.
The factory (Pistol Self-defense) loads ranged from good consistency and close to the stated FPS (Winchester Rangers) to some with quite a bit of deviation and significantly lower FPS than advertised (Remington).
Strangely enough the factory "Target" loads seemed to be more consistent than the "self-defense" stuff but admittedly my sample group was probably too small to draw any real conclusions from.
I'm proud to say that my handloads were pretty consistent though the FPS was typically a touch lower than I had expected/hoped for. I did find one .40 load that was WAY hotter than expected so I have to go back and re-asses that one