he wanted something that could penetrate body armor so he picked a 10mm pistol with hollow points.
good move dumbass...
99% of 10mm ammo is simply 40cal S&W dont get me wrong i really like my delta elite but when I really researched the performance of the ammo I realized that the performance is pretty much on par with 40cal.
Certain rounds do a little better but .45 +P rangers seem to be the best compromise considering price, expansion, penetration and cost.