Bullets from other manufacturers may not produce equivalent pressure or velocities; therefore, it is not recommended that this data be used with components other than as listed. This data replaces, supercedes and obsoletes any and all data previously published by Barnes Bullets, Inc. The information is to be used at the sole discretion of the user. This length can be determined by using a “Stoney Point Gauge” or other methods. You do not have to seat the bullet at, or on one of the cannelure rings.