I have neither the mold nor the projectiles therefrom, but I'll bet it's a good performer in .38 Super and 9mm. The bullet weight SUGGESTS that this might be its function, but I'd bet that it will work well in a .357 at the top of its performance curve.
<img src="http://www.accuratemolds.com/img/bullets/catalogue/36-147BB.png" alt="Filled view of bullet 36-147BB"/>