300blkout in full auto

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Looks like you need to start trimming some .223 brass down. The price on the .300 is still ridiculous... rolling your own is the way to go if you can get set up for it.
 
i dont plan to shoot a lot of them. its hard to find heavy projectiles.

when i shoot the 60, well 40 more i got for $15 a box i have enough 200 gr to load 4 times subsonic.
 
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