Has anybody tried to run 5.56/223 out of 50 beowolf mag.

[arakboss]

Which brand and follower did you use? Supposedly it could work based on the idea that the reverse works.

One way to save a little more money for that ammunition is by choosing a more affordable AR-15 model. And one of the benefits of going with .50 Beowulf is that you can still use the same magazines that you would with .223/5.56 NATO ammunition; you'll just have a much lower capacity.

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[DirectDrive]

It's not logical though, in this era of cheap, plentiful mags.
Stock up.