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).
If your target is a Human Being (and I hope that it's not), the .308, in the proper platform, will kill out to and beyond 1000 yards. If you are talking about a deer rifle, you max range should be, as has been said by AK, about 500 yards.And this still depends upon what the target is.here is a maximum effective range for an M14 rifle (500 yards). Maximum effective range is the maximum distance at which a weapon may be expected to be accurate and achieve the desired effect.