But it looks kewl and makes you feel better about your gun and load.
I have tested the Gold Dot in several calibers in handloads and they absolutely will expand at velocities that any snub can generate. If you can drive them at 875 fps. they'll open up. It is a very good design. 20 years ago this was not possible. We don't "need" to drive very light bullets at very fast speeds anymore, although that used to be the case.