Yep!
I bought my first chronograph in 1979, when they were pretty rare. In fact mine was the only one seen at local ranges for several years. As a result, quite a few people asked if they could try a few shots--and shooters using both factory and handloaded ammo were ALWAYS disappointed, even if they'd been using the ammo effectively for years. I can't remember any where the ammo wasn't at least 100 fps slower than they expected, and often it was 200-250 fps.
