I research this a lot, and the highest velocities tend to be from Speer's Gold Dot, which also has a hollow point like the mouth of a hungry bass about to engulf a minnow. I think the Cor-Bon is hotter, but uses a 115 grain bullet, and I won't use bullets in this caliber under 125 grains.
The Gold Dot is EXTREMELY accurate in my guns, but one S&W has "tight" chambers that barely take CCI-Speer ammo, which seems to be wider than most brands, at the limit for SAAMI specs.
I have heard that Speer needs to replace their loading equipment, which may be worn to the point that it doesn't size cases down as much as most brands do, but I don't have any idea if this is true. I do know that Speer is a tight fit in some chambers, and requires a really solid smack of the hand on the extractor rod for ejection. In the gun mentioned, I use Hydra-Shok or the various lead HP's, which seem to be overall the best performer in .38's for defense. Still, if your gun handles it well, that Gold Dot gives close to 900 FPS even in a snub!
Lone Star