Making 300 Blackout Cases From .223 Brass

My wife’s son is building a 300 Blackout AR pistol, the trouble is factory ammo is made of that precious commodity known as unobtanium. I looked at my stash of prepped .223 brass and decided to do something about it.

Converting .223 to 300Blk is not difficult, however the forums are full of new reloaders, and helping new reloaders is what we are about here, so maybe this will be timely for someone.

The “World’s Cheapest Trimmer” referenced in this post was previously reviewed here. The much more precise “World’s Finest Trimmer” was reviewed in this post.


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