In order to achieve the desired POI under varying conditions, it is sometimes necessary to aim at a point in relation to the target other than its Center of Visible Mass (CoVM). This is called a hold. At engagement ranges under 300 yards, shooter applied holds based on experience and knowledge of the conditions are usually sufficient. Long range shots may require a more deliberate method which requires the performance of ballistic calculations. Above are common immediate holds applicable to an M4/AR-15 type weapon system with a 25/300 yard zero.
