why would the military be interested in a barrel burner that ran those kinds of pressures. Seems not only barrel life but the pounding a light weight gun would take at that level would make them short lived. Don't you find it ironic that we seem to allways be looking for a replacement for the 556 and Russia recently did field a new round and its closer to the 556 then anything else. Most of this is more for the walter middy civilian that wants to come across as a ballistics expert then the solder that actually has to kill people. In the last couple years ive hear there adopting the 6.5 creedmore, 6.5 Grendel, various 6.8s. 300 bo and other versions of it and a number of others. Guys even claiming the military already has them in the field. Ask someone that is actually fighting and they haven't seen a single one. Why? Because the gun they have now just plain works! Ill make a 2 for one bet with anyone here. My 50 bucks against your 25 that 10 years from now our infantry is still carrying M16s or some variation of it and its still chambered in 556.