I have used there .223 55gr reloads, 9mm reloads and have a box of 69gr 5.56 I have not shot yet. The .223 and 9mm function fine. Not accurate but shoot and cycle the gun. One curious issue I had was with some Tannerite not going boom when shot with some .223. IDK if the load was underpowered and did not reach the needed velocity or if the Tannerite was prepped incorrectly.
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