เสียงที่ใช้ร่วมกัน

Let’s talk about the margin of error. At eight hundred yards, a human head is roughly the size of a grain of sand held at arm's length. Now... consider the variables. A light crosswind of just five miles per hour can drift a high-caliber bullet several inches off course. One tiny gust... or even a single heartbeat at the moment of ignition... can move that impact point ten inches wide.