Hi David,
I've shot up a box of 200 grainers in my 44 mag handi rifle (22" barrel). Can't specifically answer your velocity question, but the warnings about using a light crimp and low velocity are spot on. I had some loaded heavy with a standard roll crimp that were shooting poorly, so I pulled the bullets, and I saw that the crimp had cut completely through the copper plating. There's no crimp groove and the plating is very thin, and it doesn't much to cut through it. Technician at Berry's said a taper crimp works better, but I don't have a taper crimp die. Since I'm shooting in a single shot, I just don't crimp them, and that seems to work fine.
I have found that they are very sensitive to velocity/pressure, much like soft lead bullets. (In fact, they are soft lead, with a thin copper electroplating.) Too light of a charge and I got very poor accuracy, probably because bullets did not obturate into the rifling. At the proper charge, they shot accurately and cleanly. Too high a charge and accuracy went south again, AND I got heavy leading of the barrel. I suspect that at high velocity the rifling tears off the thin copper plating.
I get best results loading mine with 7.5 grains of Unique, getting a velocity of 1150 fps from my 22" barrel. I get 1.5 inch groups at 50 yards. I don't hunt with them, just use them for a light and less expensive plinking load. Thats what they're really made for. If you accept them for what they are and use them for their intended purpose, you will be happy with them. But don't expect them to perform like a premium hunting bullet.
Duane