The Forster Bench Rest Bushing Bump Sizing Die brings you an advanced level of precision by allowing you to precisely control the amount of bullet tension in your reloaded cartridges. A one-step neck sizing reduction/shoulder bump operation keeps your case necks straighter. This die improves accuracy and prolongs case life because the body of your case maintains its fire-formed glovein fit to your rifles chamber. At the same time it bumpsin the shoulder of the case to maintain excellent case neck concentricity. Best of all, it prevents overworking the neck and allows you to control the amount of neck tension for your bullet seating operation. Interchangeable bushings are available in 0.001 in. increments to enable custom neck sizing and fine adjustments for case neck wall thickness. Forster neck bushings are machined to a superior interior finish for smooth as silkin neck sizing.