The Small Base Sizer Die is for bottleneck type cases used in tight-chambering semi-automatic, pump or lever-action firearms. The sizer resizes cases below SAAMI minimums, reducing the shoulder and body by a few thousandths. It also de-primes the case. Note: Not recommended for ammunition used in bolt-action rifles.

• Sizes brass smaller than SAAMI specs
• Bottleneck type cases semi-automatic like AR-15
• Reduces shoulder and body by a few thousandths
• De-primes the case