Favorite 223 Primers





223 Primer brand & performance discussion on forums (Compiled)



If you're talking about loads for the AR specifically, then any primer that is properly seated will be fine.

I've used most brands and have never had any issues at all. I certainly wouldn't pay any extra to get a special primer.
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I can only speak from my lane. Right now I happen to have a bunch of Remmy primers. And I've loaded CCI primers too. But I wouldn't hesitate to use WIN primers at all, and infact prefer them since they feed thru my Dillon better than the other brands.
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I will say that loads chronographed gained almost 100 fps with WSR vs. Fed 205M primers, so just beware if you run around switching primers be sure and reduce any max loads first. And of course always buy in bulk...
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A poll of Highpower competitors (mostly shooting ARs) showed that Rem 7 1/2 primers are the most popular (33.23%), followed by CCIs (25.78%). The majority of CCI users favored the CCI BR4s, but both CCI 400s (small rifle standard) and CCI 450s (small rifle magnum) were also popular. [Only 10.25% of Highpower shooters polled used Federal primers (either 205M or 205).
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I Just got off the phone with Black Hills, they use a MIL spec primer he believed they were #34's on their reloads but their new ammo is factory primed..........Winchester.

(note to self: as of March 2008, BH uses Winchester factory brass pre-loaded with winchester sr primer!!)
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Not to beat a dead horse or to try and change anyones mind but I wanted to know for sure so I called Winchester. After 2 days I finally got a call back from their tech person. I asked him about the WSR primers being changed to the brass color instead of silver and being softer cupped. He said they in no way changed the thickness or hardness of the primer just the color.

I also asked about using them in an AR-15 and the possibility of a slam fire. He said they do reccomend them for the AR-15 and have had no problems with such.

I asked about the military ammo and he did say they build contract ammo to the gov't specs and could not comment on any info about them.

Take it how you want to but that's straight from Winchester, they have no issues with anyone using WSR primers in an AR-15.
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I've had a couple of pierced primers with CCI 400, using well under max loads of Varget with 77SMK and 75 H Amax. No other pressure signs, and cases gauged fine before and after firing. No problems with REM 7 1/2.

I've also noticed that the CCI 400's tend to flatten out some, even with low loads.
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In my experiance, CCI 400 flatten even at the start load of H335, but I've used them to get to M193 velocity, 3250 FPS, without a single pierced primer.
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The primers might not be your problem. The primer pockets might be too loose causing the primers to lift up out of the pocket at the moment of firing. Check the pockets.
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I had the same issue and now i only use rem 7 1/2
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I have not had problems with CCI either. Use them with IMR 4895 and Hodgdon Benchmark medium power loads.

I suspect the primer pockets too, try loading some in either virgin or once fired commercial brass and see if you still have problems. Could be if you swaged the primer pockets a little too aggressively they are not holding the new primers as securely as they should.
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I'm using the CCI 400 because I ran out of WSR.

No issues with a fairly stiff load of Varget behind a Hornady 75gr BTHP.
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Same here. I've loaded thousands of 223 using the CCI 400 primers and never had any faults. My most often loaded round is 55gr FMJ over 25gr of H335. This load is a little under max.
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Seen no major diff at 300 yards on velocity, accuracy and reliability. Used Federal, Winchester, and CCI. Thus will stick with CCI 41 and 34
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