Buy Hornady Brass 300 Remington Ultra Mag Box of 20 Online. Hornady produces brass with the same precision, attention to detail and focus on perfection that has made them a world leader in bullets. They measure their brass for consistent wall concentricity, tests pressure calibration to ensure uniform case expansion and hand-inspects each piece.

This dedication to quality ensures proper seating of the bullet both in the case and in the chamber and consistent charges and pressures. The result is optimal velocity and repeatable accuracy from your cartridges. New, unprimed brass. This is not loaded ammunition.

Brass Preparation: With bulk rifle brass you may sometimes notice a few case mouths are “out of round” or slightly dented below the shoulder.  To straighten the case mouth.  Run the case part way into the sizer die and let the expander ball straighten the brass.  To prevent the case neck from stretching, be sure to lubricate the case neck inside the case mouth.