jackmoser....go read about Trp. Coates, Ofr, Lim and Ofr. Reston.
Trp. Coates killed by a .22lr while putting 5 .38 caliber slugs into the bg.
Ofr. Lim shot point blank with a .357, removing bottom of her heart, and a tennis ball sized exit, got up, and killed her attacker with a cns shot. Lived due to life saving medical, but carried the fight to the bg.
Ofr. Reston shot in face with .45acp. Shattered jaw, carried fight to bg and won.
Self defense shooting isn't like hunting. In most hunting scenarios, you shoot, you wait. You have the ability to watch, track and locate. You get to wait for the shot to be fatal. Not necessarily so in person vs person situations. And there are many, many more documented cases where the bigger bullet didn't always win.
So while handgun hunting will give you an idea on how a particular bullet will work, it doesn't guarantee that big, bad hunting bullet will drop an attacker in his/her tracks. Or keep them from shooting back.
On that note, I have a TCP I pocket carry, when I don't owb one of my fullsize guns. I don't feel undergunned with it, and compared to my previous p3at, it's way more refined. The trigger pull is long, but smooth, and not too heavy. I like having a slide lock, and last shot hold open. IMO, it's a great value for the money, I have $150 in mine, that has been far more reliable, 100% thus far, then my p3at ever was, with multiple ftf, fte right out of the box. I just have to do my part and put them where they count.