i agree the round just dont cut it no more unless your shooting chucks and yotes. Now the 6.5 or 6.8 would be perfect. Some swat teams have switched to it. Flat shooting fast round and great all around caliber. My boy has a 6.5 bolt gun on vermiter.com and he loves it for deer and bear.
Ya know, I think the 6.5 or 6.8 are good rounds, but I think it would take a forced move by someone in a power position to ever get the military to switch from the 5.56 to one of the other cartridges. It's kinda like when the military or more specifically the Army and Marine Corps, it took the Sec Def to basically force them to buy it. Their just to heavily invested in the 5.56. As I recall the Army at least didn't want to switch from the M-14. I think the Navy didn't switch the majority of their forces back then or even now many ship board security teams use the M-14. Personally, I like the 5.56. Kinda like the 9mm, it depends on the type of bullet used whether it's going to be good for defensive or offensive operations. My primary SHTF weapon is a 5.56, not the 7.62 or 6.8 Just my opinion. Not that I don't want a 6.8 SPC or 6.5 Grendel as my service weapon if we did switch.