Years of research and testing by the Hornady® Ballistic Development Group, combined with advanced manufacturing processes and quality control measures have led to the creation of the ultimate low drag, high performance match bullet. Use of a new A‑Tip® seating stem is required for optimal bullet seating. Specifications •Caliber: 6mm .264 •Product Line: A-Tip Match •Sectional Density: .277 •Ballistic Coefficient: .637 (G1) & .321(G7) •Twist Rate: 1:8 5"" (Minimum Recommended) •Weight: 110 Gr •App