PowerBelt Platinums are plated using a proprietary process that creates a smoother, more uniform surface that reduces the standard deviation between shots. This plating results in reduced resistance as the bullet travels down the bore, producing faster, more consistent velocities to improve both trajectory and accuracy. PowerBelt Platinums also deliver an improved ballistic coefficient by utilizing a more aggressive bullet taper design. Not only does the taper provide for a more aerodynamic flight, it also helps control the rate of expansion regardless of powder charge or bullet velocity on impact. This makes the Platinum the perfect all around choice for use with magnum loads (110150 grain powder equivalent). Also, the Platinum's larger diameter, fluted gas check fits more tightly than that of a standard PowerBelt, and is reinforced to better withstand magnum pressures, improving both velocity and accuracy.QTY 15.50cal338grBC=.275