5.7x28 is the best self defense pistol cartridge available.
Gun store available SS195 confirmed to penetrate a Level II Kevlar vest :
http://youtu.be/TqaUO45Pv0EGun store available American Eagle 40gr TMJ confirmed to penetrate a Level II Kevlar vest :
http://youtu.be/HW6aI1IRxvEIn addition, civilian available Elite Ammunition Self Defense 5.7x28 confirmed to penetrate Level III-A Kevlar vests :
Elite S4M Ultra Raptor :
http://youtu.be/RrSypp272UU ,
http://youtu.be/JxBFtilO_C4 ,
http://youtu.be/gThH2tpBGqsElite T6 PFP Trident (Wound vector bullets) :
http://youtu.be/7-C8exaj3Ys ,
http://youtu.be/xbMlxdp1cSwElite ProtecTOR 40gr V-Max :
http://youtu.be/9mg1Rqp7aco (Full penetration of Level II vest, but failed to fully penetrate a III-A vest, as expected. Penetrated 15 layers of Kevlar in the III-A :
http://youtu.be/Mn9TjTRl82U )
Elite VarminTOR 30gr Match Grade JHP (Full penetration of III-A!)
http://youtu.be/TVAw7r9Fo_g5.7x28 once again confirmed for the best Military, Police, Service, and Self Defense cartridge available.
The wounding ability of 5.7 in defense loadings was proven on /k/ long ago, but many people still doubted the ability of these defense loads to penetrate Kevlar. Now they are confirmed in undeniable proof.
After this, I'm sure many of you will be wanting a Five-seveN. Any questions?