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10/20/2017 1:01:18 AM
9/22/2017 12:11:25 AM
Posted: 8/31/2005 12:41:52 PM EDT
[Last Edit: 8/31/2005 12:41:52 PM EDT by thebeekeeper1]
Between 5.56mm and .223

My AR receiver says 5.56, but will .223 cause any long term damage, I shoot both sizes but have heard one is slightly larger.
Link Posted: 8/31/2005 12:41:13 PM EDT
ammo faq?
Link Posted: 8/31/2005 12:41:14 PM EDT
Link Posted: 8/31/2005 12:41:36 PM EDT
Link Posted: 8/31/2005 12:57:00 PM EDT

Originally Posted By SubnetMask:
The ar15.com Ammo Oracle

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