From: adam.w.krajewski@gmail.com   
      
   Ok, so, I was thinking about ammunition for my in-universe guns, and I came up   
   with cased telescopic ammunition in 6.5 mm caliber, something in between   
   currently used 5.56 mm NATO and 7.62 mm NATO. Such caliber is also considered   
   for future US Army guns.    
   But then, I started thinking what would be the best type of bullet to shoot   
   here? Assuming the potential enemies often wear body armor better than today   
   ones, it could be good to have something like APDS in rifle variant. On the   
   other hand, the rod    
   penetrator could just go straight through armor and body, and to kill your   
   target fast you have to hit some important organs. The expanding bullet won't   
   work, because it wouldn't penetrate much armor. I started thinking here about   
   explosive bullets (   
   something like HEAP or APHE, I don't remember which one), but I am not sure   
   how much damage could they make, with most of the space in bullet taken by   
   penetrator.   
   Well, the requirement is for a 6.5 mm bullet that goes through body armor, and   
   kills target instantly if hits in torso.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)