For precise, consistent OAL handloads, the internals of our sizing die are designed to keep your rounds …. Round. Our hand-polished sizer die has a shorter OAL for better shoulder bump-back, a smaller base, and tighter internal tolerances.

All of our standard sizer dies include a shoulder datum collar (shoulder bump gauge) to measure shoulder bump and headspace. They also include a pin retainer should you chose to use your sizer without the expander. The wide knurling on the die and lock ring make small hand adjustments simple. The tolerances of the Whidden Standard Die give a repetitive measurement time after time. The Standard die comes complete with a die locking ring to allow the operator to secure the die at the preferred setting. Once the die is set, the locking ring is simply secured using an allen head machine set screw. This allows for a consistent setting from one loading to the next without the need for adjustment.