but in reality you can solve the problem just by neck sizing.
Or full length sizing fired (in your chamber) brass without moving the shoulder. You can even use the FL sizer to move the shoulder forward a bit if needed.
but in reality you can solve the problem just by neck sizing.
Thanks, my gun was built JUST BEFORE Remington made it a factory offering.As I recall Remington adopted the 1920s wildcat .25-06 in 1968? The chambers in the early rifles differed from the modern loading and Remington brass. The early rifles often required forming dies to match the chambers. I would cast a Ferro-Safe core and check the dimensions.
That's just weird if they are all the same.I'm wondering, I fired 3 shots and each got progressively worst: flattened primer, pierced primer, blown primer. Coinsidence or could something being getting worse with each shot.
This would definitely give you something to go by as far as checking the neck area of a loaded round to be sure they are no too big. Did you change cases from when everything was OK and these failures?I would cast a Ferro-Safe core and check the dimensions.
Definitely need to look at this variable.Any way you look at it, the load you were using was not excessive in the rifle before...and the only component changed was the new case,
I missed where he has shows the case shoulder to be "short", which would cause excess head clearance and potential case head separations.which you've now shown to be short causing an excessive headspace condition.
I missed where he has shows the case shoulder to be "short", which would cause excess head clearance and potential case head separations.
Ah, yes, the painters tape test. Not sure I put much stock in that, and I certainly didn't when I first read it. It can compress and expand. A bolt gun can compress brass in a chamber, much less tape. It could have very well pushed the shoulder back because of the tape. Who knows, they have a lot of leverage though.Post #23 is where he checked (unscientifically...but enough to indicate a problem IMHO)
I was pretty careful in setting up this but am going to double check. It is the same OAL that I was using when I was shooting 50 grains of IMR 4831 and the Speer 120 with the resized 30-06 cases.
From your OP you said your OAL was set "just missing the lands". That was in 1999, and maybe the dies were reset and you forgot? Also, are these the same lot of bullets from 1999?
As I recall Remington adopted the 1920s wildcat .25-06 in 1968? The chambers in the early rifles differed from the modern loading and Remington brass. The early rifles often required forming dies to match the chambers. I would cast a Cerro-Safe core and check the dimensions.
My old (fired) 30/06 resized cases have seen too many firings for me to feel safe using them now. Thanks.I also have the RCBS precision micrometer in 25-06 and also use it for 270 and 30-06. In your case since your rifle need special attention on head space I would get the rcbs precision mic set and I would use the old cases you have instead of the new 25-06 brass.
Head space isn't causing blown primers. It can cause premature case head separation, but not over pressure.
Bullets seated into the lands can raise pressure. Too much powder can cause over pressure.
A pinched neck from being too fat there or a case that's too long reaching into the lands/throat can cause over pressure.
That's just weird if they are all the same.
Yes, these were new, that I bought 15 years ago, 25-06 Remington cases. I ran them thru a Full length die which I wouldn't do in the future. I maybe should have just neck sized them and trimmed to length. I was using resized Remington 30/06 cases, first full lengthed, then neck sized.This would definitely give you something to go by as far as checking the neck area of a loaded round to be sure they are no too big. Did you change cases from when everything was OK and these failures?
Headspace problems don't cause pierced or blown primers. It does cause case stretching and/or case head separations.
Definitely need to look at this variable.
I missed where he has shows the case shoulder to be "short", which would cause excess head clearance and potential case head separations.
I am hoping the OP can give us more info on the cases before and now. Neck thickness maybe? Length maybe? Weight maybe?
Bullets were from the same Speer box. I verified seating depth with the new 25/06 cases and OAL was the same (or extremely close) to the old firing depth.From your OP you said your OAL was set "just missing the lands". That was in 1999, and maybe the dies were reset and you forgot? Also, are these the same lot of bullets from 1999?