Hi,
I just bought a couple cases of M193 (5.56) which is brass cased and boxer primed. Will I need to purcha$e one of these? I'm a 223 noob.

Thanks,
I just bought a couple cases of M193 (5.56) which is brass cased and boxer primed. Will I need to purcha$e one of these? I'm a 223 noob.

Thanks,

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