Subcutaneous emphysema is often found in car accident victims because of the force of the crash. Chest trauma, a major cause of subcutaneous emphysema, can cause air to enter the skin of the chest wall from the neck or lung. When the pleural membranes are punctured, as occurs in penetrating trauma of the chest, air may travel from the lung to the muscles and subcutaneous tissue of the chest wall.
Both the Army and the Marine Corps teach that the maximum effective range of the M16A2/A3/A4 is 500 meters on a point target (individual enemy) and 800 meters on an area target (i.e. troops in the open).
I am big into long range rifle marksmanship its a passion of mine. A .308 has a maximum effective kill range of approximately 800 yards however if your punching paper you should be good out past 1000 yards.The .308 ifs a very versatile round good for low range shooting as well as shooting out to 800 yards.his Site Might Help You. RE: What is the maximum effective range of a model remington 700 in .308? I have made 1000 yd shots but the bullet tip does not expand too much.