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Old November 7, 2012, 12:50 PM   #4
Senior Member
Join Date: August 8, 2012
Posts: 2,556
I've got a colt 6920 and ran some factory .223 through- Federal 100 round value pack from Walmart- for sighting and plinking. It ran just fine. Though I was limited to a 25 yard lane, and used a bipod instead of a full rest I was getting some geat groups, and it sighted in like a dream. I'd also point out the M193 is a 55 grain ball cartridge, though 5.56 rather than .223.
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