Lyman MSR Precision 3-Die Set Features The Lyman MSR Precision 3-Die Set is built around a small base sizing die which resizes brass slightly more than a standard full length die to ensure smooth dependable chambering in semi-auto 6.5 Grendel rifles. This extra margin matters in gas operated platforms where a round that chambers hard can cause a malfunction under rapid fire. A separate taper crimp die finishes the case mouth with a tight even crimp that holds the bullet securely in place which helps maintain consistent seating depth and reliable feeding from the magazine. Together these two dies address the specific demands of loading for a semi-automatic rifle rather than a bolt gun. Each set ships with an Ammo Checker cartridge go gauge giving the reloader a fast repeatable way to confirm a finished round meets chamber specifications before it is loaded into a magazine. This step catches oversized or improperly sized cases at the bench rather than at the range. The three dies and gauge are packed together in a sturdy clear cover storage case that keeps the set organized and protected between reloading sessions. Finished in black to match the look of a modern sporting rifle this set is a practical choice for 6.5 Grendel shooters at GrabAGun. Lyman MSR Precision 3-Die Set Specifications Manufacturer: Lyman Model: MSR Precision 3-Die Set Caliber: 6.5 Grendel Number of Dies: 3 Die Type: Small Base Sizing Taper Crimp Finish: Black Includes: Ammo Checker Go Gauge Storage Case Available At: GrabAGun