"For benchrest competitions where small groups win matches, or for long range shooting where slight variations in pressure multiply into complete misses, CCI Benchrest Large Rifle Primers deliver consistent ignition to hit exactly where you aim. CCI's most skilled personnel work with their benchrest primers, putting the priming mix into selected cups and anvils. Each primer is marked with a ""B"" for quick identification on the bench or in the field. Reloaders can use CCI Benchrest Primers with the same data as CCI Standard (non-Magnum) primers to get similar velocities with greater consistency. For benchrest or long range shooting Deliver consistent ignition Selected cups and anvils Produce minimal variations in pressures Use with same data as standard primers"