Lee Precision Full Length Sizing Die Features The Lee Precision Full Length Sizing Die part number 92476 is machined from steel to full length size fired 7mm Backcountry brass back to factory specifications. Full length sizing works the entire case body and neck which squares up cases that have expanded from firing and ensures they chamber smoothly in any rifle built for the cartridge. This is especially valuable for shooters loading for multiple rifles or for a gas gun where a case sized too loosely or unevenly can cause feeding or extraction issues. Reloaders get a consistent repeatable sizing operation every time the press stroke is completed. Because the die works the case down to size through direct contact with the case wall a dedicated case resizing lubricant is required to prevent the brass from sticking inside the die during operation. Skipping lubrication risks a stuck case so Lee designs this die with the expectation that the reloader uses proper lube technique on every cycle. The .284 inch bullet diameter matches the 7mm Backcountry cartridge precisely ensuring the sized case neck provides correct neck tension on seated bullets. This die is a key step in building accurate reliable 7mm Backcountry ammunition from once fired brass. Lee Precision Full Length Sizing Die Specifications Manufacturer: Lee Precision Model: Full Length Sizing Die Type: Reloading Die Caliber: 7MM Backcountry Diameter: .284 Die Type: Full Length Sizer Die Material: Steel Available At: GrabAGun