Rastus has experience with this round, and others may as well. My question on many of these pistols is the powder burn. Will there be a complete, or near complete, powder burn before the bullet leaves the muzzle?
I have gathered at the range with friends and similar handguns. Guns with the same caliber, but varying barrel lengths. If you shoot at dusk you will see the difference in muzzle flash. A couple of us have also chronographed a couple variations. There is a difference in muzzle velocities.
Some loss isn't always a bad thing, as long as the terminal result is optimal. However, I believe some of these guns are designed for marketing reasons over efficiency.