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4/14/2008 10:48:05 AM EDT
I just built my first AR last week and got out to the range to shoot in yesterday. My order from OM  hasn't arrived yet so I stopped off at the local WalMart and picked up some Remington 223. I only shot 40 rounds and when I picked up the brass, I noticed that 2 of them were missing the primer. Any ideas? What should I look for? I still have 20 more rounds left, should I get rid of them? Appreciate any suggestions, thanks!
4/14/2008 11:39:14 AM EDT
[#1]
Missing a primer is usually indicative of an over pressure condition.  Either the ammo is too hot, or your chamber is too small (or some combination).

In my experience Remmington ammo is a mild load (compared to M193), but lately there have been several posts reporting the same problem so maybe there was a mess up at the factory.
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