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This is the third case that this has happened to Lapua brass, fifth reloading running 45 gr of 2208 and a 150 gr sierra gameking. Primers are Winchester large rifle. Case prep tumbled, washed and blown out. Dirty pockets get a clean. Neck sized only.Attachment 33990
Same primers used in RP and Winchester cases no problems with them, just the Lapua anyone got any ideas?, loath to dump the 50 cases but getting little gas cuts in the bolt head is not a good look either
Its the primers.
+1
Gave all my Winchester primers away.
Haha same here, I did warn the guy they blow but he was happyQuote:
Originally Posted by Shootm
+1...Quote:
Originally Posted by veitnamcam
Agreed, dump the primers.
Not the first time this has happened.
Pooh, still could be worse think I have a pack of cci ones somewhere. Guess I'll use the winny ones for cast bullet loads.
Think you gotta a prob, I'm gluing berdan primers into my 500 BPE with nail polish cause they fall out! Got some new brass coming that take standard large rifle primers, sooner the better! My mates got 5000 old Winchester l.R primers he wants to sell.:D
@Marty Henry check the bolt face of the rifle these are blowing in
As the others said ditch the winchester primers before they wreck the bolt head on your rifle, don't even bother risking them with the sub loads either change your primers outright for everything.
So anyone want some winny lrps? as Toby said guaranteed to blow up one way or another. Make excellent firecrackers!
It's strange though that I,ve only had the problem so far in my best cases and only in this rifle, the 3030, 6.5 and all the others have been trouble free.
primers...
We (our club) had some bad winchester ones last year.
Where have you been hiding! it's the bloody primers, that problem has been around for a while.
How's the bolt face looking, mines got a nice ring now, thanks Winchester :-(
Three little pits randomly spaced round the one hole that's supposed to be there.Quote:
Originally Posted by HNTMAD
Reloaders have heaps now.Quote:
Originally Posted by Mauser308
Primers - Reloading - Reloaders Supplies Ltd
I think you should still check headspace, it's easy to forget that there could be two problems. I had this same issue with a 20cal I had and it turned out to be both the primer and headspace. All good after throwing away a gazillion poorly sized 223 cases :oh noes: (fortunately all cheap military) and changing to CCI.
Try licking and sticking a piece of paper to the bottom of a case and closing the bolt. If the bolt is tight to close, you should be good, if the bolt just falls down you may have a problem. Somewhat unscientific I know, but will serve as a general indication as paper is about .004" ish. Good luck :)
Just came in after firing 20 rounds 10 in lapua 10 in Remington brass no more blown primers I decapped all the cases and miked the spent primers sorry this is in imperial. These are the averages the primers from the lapua measured .2117 to .2150 at the top (on the bolt head) and .2087 to .2105 in the case, the Remington cases measured .2112 to .2119 top and .2092 to .2112 in the case respectively. The blown primer measured .2164 and .213 and an unfired one measured . 2101 inches all over. Then I picked the anvils out and measured the length of the spent primers the blown one was .1099 a Remington case one was .1132, and one from a lapua case was .1084 and had a pretty noticeable mushroom head. The photo shows this I think!.Attachment 34133
I don't have a micrometer or vernier caliper to check the size of the primer pockets but the primers seem to be backing out So I now have a supply of Federal primers coming and I'll repeat this when they get here but I'm beginning to think that the cases may also have to go.
Have just tried redbangs paper trick, tight bolt handle.
I haven't read threw the numbers but the primer in the middle looks to have a excessive headspace issue.
ok read threw numbers, lapua brass fired primers are measuring smaller where held by the case? there has to be a headspace or other issue going on here for the primer to back out of good pockets then get slammed in again.
If the primers are backing out of the brass it is to short for the chamber or the chamber is to long for the brass ie possible head space drama.
Also the load isn't hot enough to slam the case back against the bolt face once the firing pin & or plunger pushes the case forward.
If it does slam it back you will have a very flat primer like the one in the middle of the pic, which will look like an over load when possibly it isn't....
