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Just finish resize and clean my brass and found this "funny" marks in the neck/shoulder area, kind of a sign of it will split if i do reload it once again.
Question is: is it a sign of fatigue?
This brass has been reloaded for 7X and mostly neck sized (only 2X full sized) and i have annealing for 2X now(the second time just now).
Thank you in advance.
Mac
Attachment 36135
P.S.: the vertical marks are from the resizing die, the main thing isa the "ring" in between shoulder and neck.
Looks a bit like a crush possibly caused by insufficient lube on the case necks the marks on the neck tend to point that way. Try chambering one
I hear you, but no, it isn't crushed, it is more like "scraped" down where it get a little "material loss"?! If you can imagine what i mean…Quote:
Originally Posted by Marty Henry
Thank you for the reply.
Neck bushing in wrong way around, ie no chamfer on neck bushing
@7mmsaum,
The die is a RCBS neck die, no bushing that i can record of.
Couple of new photos as example…
Attachment 36136Attachment 36137
It if they chamber without restriction which I am sure they will, it is nothing to worry about. it should headspace further down the shoulder and unless your chamber was cut with a spec reamer you will have plenty of neck clearance.
It is likely just from the bushing or die displacing flowed brass.
Pretty sure I get it around the same amount of firings.
If you only have to FL size 2 out of 7 loads you are sweet.
Just make sure those rings are not on the inside of the neck.
Before necksizing, a projectile should slip in and out unobstructed.
You may need to clean your die as well but they look fine to me
The surface of that brass is way too rough for my liking
When the sizing die was made id say the reamer has "chattered" when finishing the cut, another new die will solve the problem
Na. Polish it out with fine paste and dremmel or drill.
Polish that die out and you will lose what little neck tension its already achieving.
The Polishing process wont be uniform either,
A sizing die should NEVER move brass like a dozer blade, if it does then its lacking a chamfer and should be replaced.
Its a sizing die which is required to gently size down the neck dia of brass, not remove metal to make the necks thinner.
Your neck tension will be uncontrolled and lessen every time the brass is forced into that die
Bin the die, otherwise all your brass will need a neck turn to uniform it and a tighter bushing in a bushing type sizing die to restore the neck tension value that you used in load development (2-8 thou)
Send it to me if you buy a new one mate. I will pay postage fix it up, and find a use for it.
Cheers
The die is quiet new, less than 300 rounds thru it, how I need to "dump" it in the bin??? I thought a die would last a while
Has the die always made those marks ?
Was the last die you used before noticing those marks on the neck the neck sizing or the full sizing die ?
Should not look like that, the neck is a fairly critical area for accuracy.
Unscrew the de priming rod from your die(s), and give the inside a good clean with something like crc and use an earbud. Shine a torch inside to check it is all clean, smooth and shiny.
Has anything else changed in your reloading routine if this did not happen before ?
I have no idea, these guys both no there shit.
I will say buy good dies!!
Sent from my iPhone using Tapatalk
So, thank you @BRADS, @ebf, @7mmsaum and all of you guys who reply to my question.
No, the vertical marks in the neck is not bothering me at all, it happen just/only this time during e "neck sizing" process, what I am more concerned is about the "ring" mark going around the neck and shoulder area, that sounds very "odd" to me.
No, I haven't changed my reloading routine at all, regards all the feed backs you guys gave me, I just fired the last 8 rounds from the same reload batch so I will clean it up and do the thing and check if any difference/alteration in these brass.
Thank you a lot once again, I will keep you guys posted about this experience(incident).
Mac
Your die needs to be pulled to bits & the brass that is stuck on it needs to be carefully removed by polishing with autosol etc.
You need to lube the brass more when sizing it.,
It is possible it is a little soft after annealing making the brass easier to pick up onto the die.
If you can see up into or down into the die you will see brass stuck to it in the neck area.
Until it is removed it will continue to mark the neck which is undesirable
Just arrived to the thread.
You have just annealed your brass, neck brass is soft now and has picked up in the die and will mark all soft brass.
Clean/soak die with copper solvent, this will destroy the brass then clean and polish the inside of the die, this should be able to be done with no measuarable difference to the die dimensions.
lube necks and size away :)
yea nah that's just wrong!!!!! could it be rust inside die???? never seen brass bulldozed like that!!!!!! whatever it is that's doing it ,it shouldn't be cutting brass
Is this a new gun? hmm Id put a bore scope down the chamber and have a look around that neck area, maybe its been badly machined?
bend a paper clip and run it past that area on the inside of the case but I dont expect anything.
What gun?
PS the brass now its been annealed is softer so will form in the chamber better, hence Im wondering on the state of your chamber.
Quote:
Originally Posted by PERRISCICABA
Marks are from sizing not firing.Quote:
Originally Posted by steven
