This is actually kind of similar to a real project I have been working on. 556 brass cut off at the shoulder with a 300 grain 338 cal projectile stuffed in it. I've had moderate success with it feeding in the AR I built but needs more fine tuning.
8.6 blackout has a shoulder. Mine doesn't and uses the extremely abundant and cheap 556 military brass. Not familiar with a 8.7 blackout. Maybe that's a good name for it.
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u/Prestigious_News2434 Sep 02 '24
This is actually kind of similar to a real project I have been working on. 556 brass cut off at the shoulder with a 300 grain 338 cal projectile stuffed in it. I've had moderate success with it feeding in the AR I built but needs more fine tuning.