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Does Lee offer a Powder Thru Expanding Die for the 300 AAC Blackout?

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No, we do not offer a Powder Thru Expanding Die for the 300 AAC Blackout. Case mouth expanding is performed in the Full Length Sizing Die for rifle calibers. To charge the cases, we make a Short and Long Charging Die. Due to the length of the 300 AAC Blackout cases, you would use the Short Charging Die. The Short Charging Die is meant for cases between .860" and 1.760" long.

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