Help!

They were. I had previously loaded 10 rounds for testing and had no issues at all then tried to load twenty more after finding a good load that needed a little more testing at longer ranges and this happens.
 
Perhaps this is your issue. My son had the same issue. He forgot to adjust the seater die to the top of the neck. Put a case in the shell holder and screw the seater down till it just touches, back the die off a quarter turn and tighten the lock ring. Good luck
Sorry butterbean, was typing and didn't see your post.
 
I can't believe you would do more than 2 before you called it quits?

Run case neck through an expander, deburr the inside with a VLD tool, adjust seating die out and stem back down for proper seating depth.
Well I would get a couple of good ones then a bad one, then a good one then two bad ones. Slow learner I guess. :(
 
Well I would get a couple of good ones then a bad one, then a good one then two bad ones. Slow learner I guess. :(
That sucks.
Can't say I never had it happen though. Had two pieces of new Nosler .280AI brass ruined that way. I called them the new 7mm Foreskin.
20170828_185945.jpg
 
Perhaps this is your issue. My son had the same issue. He forgot to adjust the seater die to the top of the neck. Put a case in the shell holder and screw the seater down till it just touches, back the die off a quarter turn and tighten the lock ring. Good luck
Sorry butterbean, was typing and didn't see your post.
No biggie but your correct as well
 
Your die could've pushed on the case mouth, I set mine to push the bullet at the end of the stroke, also chamfer the inside of the case mouth to make it easier to seat bullet, I've done this with 257wby brass, pretty sure it's ur die hitting the case
 
Like the others said back the die off. But if your die is like my Hornady dies there is a "sleeve" that floats inside the seater die. Sometimes this gets stuck and collapses brass. I think there should be a c clip at the bottom of the seater die. Take it apart and make sure nothing is binding up and reassemble. Then set up the die with no crimping.
 
I had the same problem with some new ADG brass in 6.5 Creedmoor. First it was seating some Barnes bullets. Looked just like those ones. I hadn't run them over a expander ball and they are a bit too tight, and a bit too small... I did manage to squish a few shoulders (not quite as bad) with just the expander ball too...

In the end, I had to put a really good inside chamfer on the brass, then set the sizing die so that it would only run the expander through, not pushing the shoulder at all, AND lube a little with some case lube, before it stopped happening...

It didn't happen as much with some Hornady ELD-X that I was loading, but still a few times...I'm pretty sure it had to do with the sharper shoulder of the Barnes boat tail catching on the case neck, wheras the Hornady had a smoother transition that managed to slide past...

I did manage to completely destroy about 6 cases out of 2 boxes, but once I had caught on to the fix, I was able to FL resize the ones with the shoulders that weren't pushed down as far as your picture.

I have reloaded at least one of those boxes since then, and there were no issues at all. Just seems like the necks were too tight as manufactured...and the brass was too soft to take the pressure of forcing the bullet into the neck... I wouldn't say you were doing anything wrong. I've loaded well over 10k (probably 15 to 20k) rifle rounds and this is the first and only time I've ever seen this... I have 150 pcs of 6.5 PRC ADG brass waiting for the gunsmith to finish, and it will all be getting chamfered and expanded w/graphite before I ever try to seat the first bullet...
 
I had the same problem with some new ADG brass in 6.5 Creedmoor. First it was seating some Barnes bullets. Looked just like those ones. I hadn't run them over a expander ball and they are a bit too tight, and a bit too small... I did manage to squish a few shoulders (not quite as bad) with just the expander ball too...

In the end, I had to put a really good inside chamfer on the brass, then set the sizing die so that it would only run the expander through, not pushing the shoulder at all, AND lube a little with some case lube, before it stopped happening...

It didn't happen as much with some Hornady ELD-X that I was loading, but still a few times...I'm pretty sure it had to do with the sharper shoulder of the Barnes boat tail catching on the case neck, wheras the Hornady had a smoother transition that managed to slide past...

I did manage to completely destroy about 6 cases out of 2 boxes, but once I had caught on to the fix, I was able to FL resize the ones with the shoulders that weren't pushed down as far as your picture.

I have reloaded at least one of those boxes since then, and there were no issues at all. Just seems like the necks were too tight as manufactured...and the brass was too soft to take the pressure of forcing the bullet into the neck... I wouldn't say you were doing anything wrong. I've loaded well over 10k (probably 15 to 20k) rifle rounds and this is the first and only time I've ever seen this... I have 150 pcs of 6.5 PRC ADG brass waiting for the gunsmith to finish, and it will all be getting chamfered and expanded w/graphite before I ever try to seat the first bullet...
Great infor thanks for the response.
 
No sizing done just dropped the powder, inserted the bullet and tried to seat it. This is the results.
Sounds silly but are you using .308 bullets or 338 bullets. My 270 WSM brass did the same thing when I had my head up my ... and was seating .284 bullets in them. It's humiliating but I'll confess to many like calibers and always in a hurry!
 
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