AR15.Com Archives
 win small rifle primers in 556
500SWshooter  [Member]
10/14/2009 11:26:33 PM
Has anyone used win small rifle primers in 5.56 loads. A long time ago I tried federal bench rest primers and ended up with slam fires. Since then I have used CCI #41 or CCI magnums with no issues. With the current market I only have 5000 Win primers and I have been reluctant to use them out of fear of more slam fires.
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ma96782  [Team Member]
10/14/2009 11:39:30 PM
I've been using Federals as my first choice and Winchesters as a second choice. My third choice is the CCI brand of primers.

That being said........I also use a hand reamer tool to deal with military crimps. And, I seat new primers with a LEE hand primer tool. The primers get seated "below flush." I've found that CCI are IMHO, "more difficult to seat."

YMWV.

Aloha, Mark


LiveToDrive76  [Member]
10/15/2009 12:23:56 AM
I loaded a few thousand rounds with WSR primers and didn't have any problem out of four different AR's. I was told on this forum that they were soft and I would have issues with them but I wasn't going to toss them out cause at the time small primers were no where to be found! I would use them again. Try loading a few and see what happens, or you could send them to me and I'll give you a full rage report.
69CougarXR7  [Team Member]
10/15/2009 12:28:18 AM
I've used 6-7k and have no problems. I prefer to use them when they can be found
ma96782  [Team Member]
10/15/2009 12:32:00 AM
Then, there is the old Winchester primers vs. the new Winchester primers question.

Aloha, Mark

500SWshooter  [Member]
10/15/2009 12:33:34 AM
they are the newer ones in the blue box without the nickel plating.
the-fly  [Team Member]
10/15/2009 1:40:15 AM
I've used 10k worth of the new ones in 223 without problems. I did notice that if I was trying for 5.56 pressure loads, the Winny's would show signs of pressure a lot quick compared to CCI 41's or Wolf magnum primers.

I use Wolf for everything anymore.

dryflash3  [Team Member]
10/15/2009 9:08:06 AM
I used to use WSR primers for years and had no problems with them. Nickel plated or plain brass.

I have since switched to Wolf SRM, just can't find the WSR.
AeroE  [Moderator]
10/15/2009 11:56:59 AM
Originally Posted By 500SWshooter:
Has anyone used win small rifle primers in 5.56 loads. A long time ago I tried federal bench rest primers and ended up with slam fires. Since then I have used CCI #41 or CCI magnums with no issues. With the current market I only have 5000 Win primers and I have been reluctant to use them out of fear of more slam fires.


Slam fires?

Check the primer seating depth. The primer should be 0.002 to 0.008 inches subflush.

Xringlover  [Member]
10/15/2009 12:27:43 PM
I have used the old & new primers. WSRs are all I use for .223/5.56 reloads. Hard to find right now though. Have plenty enough for me so not concerned with locating more at this time..
We-rBorg  [Member]
10/15/2009 1:09:01 PM
The old nickeled primers had no problems, but when Win first went to the brass ones, people started having pirced primers if they were shooting hot loads.
Just wondering if Win went with a thicker/tougher primer since then.
Shooting competition, people tried to get the most vel they could. so most of them load toward the hotter side.
'Borg
ETA getting slam fires with Fed primers, I tend to agree with the high primer being the problem,, have just shot too many without problems.
500SWshooter  [Member]
10/15/2009 6:30:17 PM
My primers were not high, I alway seat 3-5 thou below and check them. I think the problem had to do with the sensitivity of the bench rest primer. I have been loading for 20 years and have loaded and shot hundreds of thousands rounds. I just figured that they must have designed a primer for the 5.56 for a reason as this was the only time I ever had the problem of a slam fire.
AeroE  [Moderator]
10/15/2009 6:37:53 PM
Originally Posted By 500SWshooter:
My primers were not high, I alway seat 3-5 thou below and check them. I think the problem had to do with the sensitivity of the bench rest primer. I have been loading for 20 years and have loaded and shot hundreds of thousands rounds. I just figured that they must have designed a primer for the 5.56 for a reason as this was the only time I ever had the problem of a slam fire.


I've never had a slam fire in an AR rifle with any Federal, Remington, Winchester, or CCI small rifle primer. Benchrest primers are not more sensitive than any other type, and in the Federal line, they're the same primer with an added inspection step to check for an anvil. They can't have thinner cups for a benchrest application, the pressures are just as high as for any other cartridge.

Back in the late 80's it was slam fires in M-1A's. They were caused by high primers and failing to make the bolt strip a round off the magazine or run across a single load adapter.

If I were you, I would check the firing pin tip to find out if it is damaged, maybe by a pierced primer, and then the protrusion. If those two details are good to go, I don't know why you had a slam fire unless you chambered a round then let the bolt fly into battery without stripping it off the top of a magazine follower.

jfwyatt1  [Member]
10/15/2009 8:22:29 PM
only problems ive had using them was i had an out of spec firing pin that was pircing them. but thats it out of 3200 loaded so far this year.
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