6.5×57mm Mauser
The 6 . 5×57mm Mauser ( designated as the 6 , 5 × 57 by the C . I . P . ) is a smokeless powder rimless bottlenecked centerfire rifle cartridge developed by Paul Mauser and introduced in 1893–94 . 
<triplet> centerfire <subj> cartridge <obj> subclass of