Originally Posted by SCmasterblaster
So my 115gr Hornady 9mm XTP bullets are no good for SD?
Oh, I'm not saying that. To be honest I don't know much about that round. Lucky for you 9mm guys you do have lots of documented street shootings to help along with ammo selection. I would personally stick to one of the common bullets in 9mm for SD purposes in big factory name loadings or Underwood. The XTPs are meant for deep penetration but are not really expansion kings. Many of the other common bullets such as the Gold Dots, HST, etc give good expansion and meet most peoples needs for minimum penetration with street cred to boot.
The reason I said that about the 10mm 200 grain XTP is because of a few reasons. One is that the XTP, again, is really a hunting bullet with tough construction. Two, it has a high sectional density at that weight. Three, the combination of these factors coupled with the higher energy levels of the 10mm, IMHO, make it unsuitable for common SD purposes. Energy is essentially the bullet's ability to do work. Although some energy is lost in the way of heat (and other things) there is plenty enough ability left to possibly make it over penetrate with the potential for deep penetration on another (inocent) target.