p_ham
Well-known member
Only 175-200fps..Not much to gain with the AI chamber in .223.
556 has a larger diameter freebore than 223, but throat length varies. Shortest to longest: 223, 223 wylde, 556, 223 match. I'm not sure what the standard spec is for 223ai.I wonder how going about AI'ing a 5.56 would go as I assume most reamers are based on 223 AI and some of the neck/throat dimensions of a 556 chamber might be larger than those in a AI reamer. Or are there reamers that don't even touch the throat?
Neck dimensions are very close, with the match chamber being the tightest.
You can get body reamers but I'm not sure it'd be worth the money to have one ground.
You can also get reamers ground to whatever spec you want but expect to pay about $400 for a reamer.