<page_title> 6mm Remington </page_title> <section_title> Velocity </section_title> <table> <cell> 1955 <col_header> Year </col_header> </cell> <cell> 244 Remington Hi-Speed 75 <col_header> Ammunition </col_header> </cell> </table>
The 6mm Remington cartridge introduced in 1955 as the .244 Remington.