Buffalo Arms Company Precision Swaged Paper Patch Cup Base Bullet in .399" diameter, 1.440" long and weighs 450 grains. These bullets are swaged from certified virgin PURE LEAD extruded wire and have a cupped base. The swaging process virtually eliminates problems with cast bullets such as voids, irregular hardness and grain structure, air pockets and mould lines. These bullets are NOT PATCHED (item #PPPAPER).