Originally Posted by Shahman
I'm curious about your thoughts. For self defense purpose, and assuming you're defending against humans and not bears, which of the 2 variables is more important - velocity or expansion?
I just bought my first and brand new Glock (19 Gen 4); and was thinking about getting Barnes TAC-XPD ammo, I noticed that at 115gr, it's a lighter bullet and also has less velocity than some of the others.... what are your insights/ experiences....etc?
What I look at is a factor of velocity, bullet construction, and weight. I look for enough penetration, preferably 14" or more in bare gelatin, but no less than 12". Preferred velocity is bullet construction and bullet weight specific. For example, the Barnes Tac-XPD 9mm is loaded extremely light even though it is listed as a +P load. TNOUTDOORS9 tested it and had an average velocity of only about 1060fps out of a Glock 19. Penetration was too little for my preferences at 10" +. However, Corbon's load with the same bullet was chronographed by the same tester at 165fps faster (1225fps). That load performs much better and penetrates adequately. Other bullets will often expand well and penetrate deeper at standard pressure velocities rather than higher +p velocities. Some loads, such as Hornady's Critical Duty will penetrate barriers better at +P velocities. In my 9mm's I carry the Hornady Critical Duty +P as penetration tends to be better while still obtaining good expansion and good barrier blind performance.
I would avoid the Barnes ammo and stick with one of the other loads that have tested well in bullet weights of 124gr or more. Federal HST, Hornady Critical Duty, or Speer Gold Dots work well and can be purchased online for about $27 a box of 50 rather than about the same price for 20 of the Corbon DPX or Barnes Tac-XPD.