Whidden Gunworks Full Length Bushing Sizer Dies utilize Redding or Wilson standard bushings to size brass to exact specifications to achieve the desired bullet tension. Manufactured to match PTG Match reamers often used in custom rifles, these dies guarantee easy chambering and extraction without overworking brass. Whidden Gunworks sizer dies include a shoulder gauge to aid with proper setup of headspace. The fluted top allows for a better grip to make adjustments quick and easy. Shellholder sold separately.