Recently, a friend and I have been discussing “in-between” caliber options for the AR-15 platform. There are a plethora of proven options for close-range shooting with a light to moderate recoil tax. Think about the classic AR-15 chambered in .223 Remington and the 300 Blackout. There are also great options for long-range shooting too. 6.5 Creedmoor, the Grendel, and the new .224 Valkyrie come to mind. There are others, but you get the idea. As for the “in-between” solutions that can effectively reach out past 500 yards, but without all the boom and thump of something like as .308 AR-10, what should one consider?