The Berger 6mm BR Column bullet features innovative engineering focused on precision balance rather than exact weight specifications. This 64.2 grain flat base bullet utilizes a specific internal lead column height to achieve optimal balance and performance.Berger 6mm (0.243") BR Column Flat Base Bullet64.2 grain nominal weight with precision balance designInternal lead column engineered for consistent balanceWeight may vary slightly (64.6-65.1gr) while maintaining optimal column heightFlat base configuration for reliable performanceDesigned for precision shooting applications where consistent balance and performance matter more than exact weight specifications. The unique BR Column design ensures reliable accuracy through engineered internal construction.