Remington Benchrest centerfire 7 1/2 small rifle primers is a group of subcomponents assembled to exceptionally precise tolerances. Primer cup dimensions are controlled to four decimal places. The priming mix is specially formulated for consistent ignition with a wide variety of powder types and tested for reliability. A unique tripod anvil design creates a larger sweet spot with maximum sensitivity, even with off-center firing pin strikes. Features reliable ignition from -20 degrees to +150 degrees, pellet weight controlled to .01 grams, and metallic dimensions controlled to .0005.