SKU: LEE90480
UPC: 734307904807
MPN: 90480
The Lee Undersize Mandrel .3055 is a precision reloading tool designed for shooters who demand consistency in case neck sizing. This undersize mandrel is essential for handloaders working with popular rifle cartridges including 308 Win, 30-06, and 300 Win Mag. Whether you're a competitive shooter, hunter, or law enforcement armorer maintaining duty weapons, this mandrel ensures superior round-to-round uniformity.
The .3055 undersize specification indicates that this mandrel is designed to create a tighter bullet fit, which minimizes runout and improves concentricity. This precision engineering—hallmark of Lee Precision manufacturing—delivers measurable accuracy gains, particularly in precision rifle applications where neck tension directly affects velocity consistency and group tightness. The compact 3.25-inch length and 0.1-pound weight make it a practical addition to any reloading bench.
Serious handloaders—from military precision rifle teams to competitive shooters—rely on undersize mandrels to achieve the tighter neck tension required for sub-MOA performance. Law enforcement armorers benefit from the consistency this tool provides when maintaining duty ammunition specifications. The Lee Undersize Mandrel .3055 is compatible with Lee's press-mounted sizing systems for seamless integration into your reloading workflow.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
