Summary: What is the new round the will make the 5.56mm obsolete... Well none of these at least not any time soon. But there are some awesome rounds like the 6.5 Grendel or even the .458 SOCOM. We'll look at the most popular other rounds for my favorite platform and what they all offer and why it is that they aren't the ones that you want to rely on for the end of the world. There are a few basic reasons but why tell you here when you can just listen.
