I bought a couple K 6 1/2s a while back by mistake, loaded up and shot a bunch of 223s 52 grainers for my SP1 AR and didnt have a problem. Although when I notices the mistake I set the 6 1/2s asided for my 25-20 and 30 Carbine.
I suppose the 6 1/2s would be ok in light 223 loads using the cast bullets I use for off hand practice.
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Kraig Stuart
CPT USAR Ret
USAMU Sniper School
Distinguished Rifle Badge 1071
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