down range
adv.— «The Landstuhl facility, the largest American military hospital outside the United States, sits atop a small mountain overlooking the town of the same name.…A quarter of its multinational patients arrive with hard-core battle injuries from Iraq and Afghanistan—”down range,” as the war zones are called—the hospital is, aesthetically, far enough from Balad to be on another planet.» —“The Doctors of War” by Bob Drury Men’s Health Jan. 30, 2006. (source: Double-Tongued Dictionary)
Further reading
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After our conversation about the expression dingle day, a term used by workers at a research station in Antarctica to denote bright, sunny weather, a listener offers a possible explanation for this term. It may derive from the idea of the skies...
For military and police types “down range” is the direction you want you bullets to go