Primer Problem ?

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Ronnie3

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Hello, I've got a problem with pirecing primers on my Rem XR100, 6 BR, the gun has just over 900 rounds through it and I've never had this problem before, I loaded a 100 rounds with new Lapua brass with CCI 450 magnum primers, 30.6 grains of Varget, 108 Bergers .030 into the lands and after about 8 shots it pierced a primer, I continued shooting thinking it might have just been a bad primer 3 shots later another one pierced, and some of the others I shot look like the one in the pic below ( center almost popped out ). Then I tryed reseating the bullets so they were .005 out of the lands and it still pierced primers.
Conographed them at 2873 FPS.( not exssive ). These are primers out of the same brick that I used with fired once brass and never had any problems, I loaded somemore today with the same primers but used brass again, .015 into the lands and Conographed them at 2900, shot 35 rounds and no problems, I just checked the lot # on the box of brass that I used with the ones that have the problem and its the same as all my others.
The only thing I noticed is that the primers did go into that new brass a little tighter ( not much ) than normally. I'm thinkin its a problem with that box of new brass, but I'm just guessing.
Anyone run into this ?
Info appeciated.

DSCN1903.jpg
 
Ron,

Try a different lot of primers. I can't see the brass causing primers to pierce unless your flash holes are semi-plugged. Did you check them before priming?
Is this the same lot of primers you shot at the Farky and had problems with?

I had sore hands after priming new Lapua brass....2nd time around was still really tight but not as bad as priming the virgin brass. I have not pierced a primer yet in the thousands that I have shot, some charged WELL over what I normally shoot.

I do have issues with cratering in one of my actions right from 30grn loads up to 31.5+ loads.
 
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Hi Richard, yes, there the same primers I had problems with at the Frosty Farky on Sunday when I was using the new brass, but the 35 primers I used today with used brass were also from the same case, didn't have any problems with them and the primers I used on Saturday at the Frosty Farky were also from the same case, also different ( used ) brass , same bullets, same powder, same loads, and I never had any problems on Saturday, It still could be the primers, seems wierd that they only did this with that new brass, but it could be , I guess I could try the same load with new brass and different new primers and see if it still does it. I didn't check the flash holes in the brass when I was loading, I checked them now on the ones I had problems with and they seem fine, but ?? . Are you guys all using the CCI 450 primers ? are there any better ( tougher ) magnum primers available ?
Thanks, Ron
 
I use BR4's in my gun but have used the 450's as well with no issues. I believe CCI is the hardest cupped primer around.

Maybe try some BR4's with the new brass and see if you have the same problem.

Also maybe try that same lot of primers in the same brass now that it has been fired and see if it does it again.
 
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It looks like a few things are a problem, I would really check you firing pin and bolt it looks like you may need a oversized firing pin or a bolt face to have a bushing put in. The clearance between the firing pin and the bolt hole is to great. It's not really a primer problem. Also It looks like your main spring(firing pin spring) is weak. This should be replaced as well.
 
That is a PT&G bolt if I'm not mistaken...

I agree with Brent's assessment of the firing pin hole. However... Not sure if it's the lighting, but that brass looks pretty hammered on the back end... once fired you say? If that brass is as hammered as it looks, you have a pressure problem. Mic the bullets and make sure they are not the culprit
 
A quick way to prove this is take a loaded round and fire it through another rifle. If problem doesn't happen on the other rifle It the orginal rifle's issue. I have seen this problem lots( in my rifles and well as others) It is alway in a factory type action with a few rounds througt it. I replaced firing pin or bushed bolt's It alway solves the problem. Holland sells oversized pins.
 
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Remington rifles occasionally have a problem with the blanking of primers with hot loads (and that is a hot load as are most 6BR loads in use). The root cause has two facets. The first is the softness of the small rifle primer cups. I have had no problems with Winchester or Remington 7 1/2 but have had with Federal and CCI. The second problem is the firing pin diameter which is a little large. In this respect, the Remington is not as bad as the post-64 Winchesters which have a .081" firing pin tip. That the hole in the bolt face doesn't fit well also doesn't help.
Sometimes the cure is as easy as polishing the firng pin tip so it is a nice, smooth radius. At the same time, a slight reduction in protrusion can help out as well. Keep protrusion between .045and .055" Occasionally, the installation of a slightly heavier striker spring will help (don't overdo it).
Speedlock kits which incorporate a titanium pin make matters worse since the new pin lacks inertia to support the cup. The heavier spring used to compensate for the lost weight doesn't quite work as well since the heavy spring may penetrate the cup further and the pin may even tend to bounce a bit.
Most custom actions now utilize a 1/16" firing pin tip which is a certain cure. One can reduce the tip diameter on the Remington then bush the bolt face and permanently cure the problem. Regards, Bill
 
Thanks guys, I am using a Pacific Tool Bolt, I just took it apart and measured the firing pin dia .074 , it stick out about .055 ( kinda hard to measure that without the right tool ), the spring seems really tight, theres no way I can push the pin in using a wooden dowel, and it seems to fit nice and tight in the bolt hole ( a little play, but not much ). I should probably send the bolt in to Pacific Tool and see what they come up with, but so far I havn't been able to find a phone # or address, or website, anyone know how to get a hold of them ?
Thanks again, really appreciate the info.
Ron
 
i am with Leeper in checking the primers some primers are softer then others. if you have access to wolf primers try the magnum primer if not try magnum in other brand. PLEASE NOTE reduce the load by 10% if you are switching to magnums for this test.

The other is bushing the firing pin to reduce the diameter of the firing pin from the current .074 to .062 or there abouts.

good luck
Trevor
 
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