Smith & Wesson just released a 10mm version of the M&P. There are now a few decent guns in 10mm out there. This brings up the question of what are the better defensive loads for 10mm? There is a subsidiary question as to whether for defensive use against human attackers, 10mm has any advantage over the more standard calibers (9mm, .40, .45, maybe 357SIG)? Given that it's the same caliber as .40, is the extra velocity useful in increasing the rounds effectiveness? This is especially true because most 10mm hollowpoint bullets are designed for .40 velocities
As an example of why I ask the latter, watch the following video.
Yes it's an amateur gel test, and not done with real organic gelatin. But look more at the effect on the bullet. It overexpanded to the point where it's expanded diameter is less than the comparable .40 load. So is the extra 300+ f/s of velocity generating any added effectiveness?
Are there any 10mm loadings that really make use of the 10mm's added velocity?