RCBS 11131 Small Base Sizer Die Group A .223 Rem

The Small Base Sizer Die is for bottleneck type cases used in tight-chambering semi-automatic, pump or lever-action firearms. This 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.

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