Shot it today. It shoots! It shoots well! This was my first 5 shots (and the only ones I have pictured so far). This was at 30 feet offhand with some cheap, generic .38 Special loads (158 gr LSWC). The first 4 are in the only long hole with #5 dropped down a bit.
Note that this was using a center hold, so it was hitting about 4" high of POA (and a bit left).
I also fired some Fiocchi 142 gr FMJ TC .357 Mag loads. They actually shoot even better! With a 6 o'clock hold they were striking the center (so 3" high). at 50 feet, standing and with the foreend rested on a bag, 5 rounds made one rectangular hole about 3/4" across (like the 5 pips on a die with 4 in the corners of a square and the fifth removing the center).
The trigger is smooth and creep-free, but pretty darn heavy. I was struggling to get good shots off before getting fatigued in my trigger finger. I'll first try a full dis-assembly, cleaning and lube and see if that helps. If not, anyone know how to fix a rolling block trigger, or know a smith who does?
So, yeah...I'm pretty pleased with my bargain .357 single shot.
Rob