The AR chamber is usually shorter in OAL than standard 223, is it not?
The throats are normally a little longer on the latest itinerations so as to be able to digest the heavier and thusly longer bullets that the faster twist rates we now see were designed and adapted for.
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About 2016 team "R" candidates "We definitely need a crew with a sack of balls the size of hot water bottles, bloviated estrogen leaking feel-gooders need not apply." Gunner 500
