I know it's limited to shorter ranges than the 6.5 Grendel, but good grief I'm seeing great deals pop up on 6.8 ammo all over the place. Palmetto State has the FBI Gold Dot load for $10 a box, and 6.8 selling at all my ammo retailers in greater variety and better prices than ever before. 6.8 parts are also easy to find these days.
I shoot some pigs, usually at close to intermediate ranges, and have .300, and 5.56 rifles for different jobs but have never been really impressed with 5.56 performance.
So why shouldn't I put together a 6.8? Is the 6.8 going through some sort of renaissance?