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.223 loads always give disappointing velocity in military 5.56 barrels. You need to run a longer barrel or make up your own load data to get them going fast. For example last week I chronied a 55gr load out of my 16" M4. 25.5gr of BM2 was giving me 2650fps on average.
do you regard that as slow or normal for length?Have you pushed it as hard as milspec loads?
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