Redding Reloading 7-6.5 PRCW 1 Full Length Series Z Die Sets Steel Small. The revolutionary Z Series Die Family utilizes Larger Stronger and more Robust 1 die bodies. Redding engineering has proven that the modern high performance cartridge designs of today are severely taxing the capabilities of traditional 7/8 reloading dies. The 7/8 diameter became the industry standard in the post WWII era but todays new cartridge designs provide numerous reasons to question that standard. In short it is all about the strength of material the stresses induced and the deformation that occurs in the die itself. With the revolutionary Z Series Dies the handloader can see feel and measure and the difference. Based on relative strength the Z Series Dies are as much as 2X stronger than traditional 7/8 dies. Extensive lab testing has shown that this increased strength and rigidity provides significantly reduced sizing effort as well as more consistent and measurable sized case dimensions. Package Contents: Redding Reloading Z Series 1in Full Length Die Sets Redding Reloading 89612: 7-6.5 PRCW 1 Full Length Series Z Die Sets Steel Small