Re: Primer Pin Whole
Primer pocket was not enlarged. This was these cases third time being fired, and primer tension was good when seating. They may "Appear" to be enlarged in the photos due to the jet blast that flowed around the recess.
Cratering could also be from too tin of cup material when forming the primers. (I didn't get results like this from Federal Gold Metal Primers) Not hard to figure out that with the cost of materials, using thinner material will save a company lots of money. Also, this lot was produce during increased demand for product, which could reduce QC.
I have not ever removed a primer from a rifle case, and have a "Clean" primer pocket. Stopping all the escaping gas from exiting around the primer in near impossible.
I do agree that that all other clues should not be discounted, but I didn't just blurt shit out without doing my own investigation first.
Answers to your questions:
1. Of the load from June at or around 600 rounds of this load with one failure, and 20 of the most recent load with one failure
2. This most recent load was just developed.
I have over 200 rounds load with these primers, so I can mail them as many as they like.... Maybe they'll be able to figure something out. A benchrest shooter at my club had a similar problem a month ago with the same primers....
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BuzzBoss915</div><div class="ubbcode-body">I don't know? I have looked at the photos, looks like a hot load, to me.
What bothers me a little, on this board we have a lot of blame for component failure, bad dies, shit brass, crummy presses and now primers with weak cup material. Statistically, primers are manufactured by the thousands, hundreds of thousands every day and the engineering that goes into making such a simple and reliable component that is designed to go boom every time. I just doubt that we have a bad primer, the odds alone are against it.
The primer pocket is enlarged, a sign of a hot load. You have excessive cratering, another sign of a hot load, and you have ejector marks on the case head, a very reliable sign of excessive pressure. Don't forget, it's possible for primers to leak all around the outside of the pocket. Why the primer burned through in the corner, I don't know, but I would not look at that single clue and discount all the others and conclude that this is a bad/defective primer.
How about some data? How many rounds of this particular load have you fired, how many were loaded and only had two failures? Is this a load that you have been using for a long time or is it something new?
I further doubt that Winchester will be able to test the hell out of what remains and give you/us an answer. Some things are unknowable. But, if it looks like a duck....
BB </div></div>