What did this to the neck of these .308 rounds?

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What did this to the neck of these .308 rounds?

Postby Bergie on Sun Sep 26, 2021 6:44 pm

I came into some brass recently in a grab bag and there were two ‘sets’ of .308 empties. One set looks ‘normal’ but the other looks weird. It looks like either someone fed the rounds through the wrong gun (but they wouldn’t have fit) or sized them down at the neck. See pics. The length of the cases is all the same at 2.0285”. The neck on the normal ones measures .3345” and the odd looking ones measured .2825.
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What did this to the neck of these .308 rounds?

Postby Ironbear on Sun Sep 26, 2021 6:55 pm

Could they be .308 resized to 7-08 or .260 Remington?
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Re: What did this to the neck of these .308 rounds?

Postby 870TC on Sun Sep 26, 2021 7:36 pm

My guess, some dingle nuts fired 308 in a smaller caliber. Did you punch the old primer or did you find it that way?...if you found it that way, it probably blew out from high pressure
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Re: What did this to the neck of these .308 rounds?

Postby OldmanFCSA on Sun Sep 26, 2021 8:50 pm

260 REM.

NOT annealed before case forming.

NOT neck-turned.

Folds in brass makes them SCRAP.
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Re: What did this to the neck of these .308 rounds?

Postby Rip Van Winkle on Mon Sep 27, 2021 5:21 am

:iagree:
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Re: What did this to the neck of these .308 rounds?

Postby Bergie on Mon Sep 27, 2021 7:13 pm

Yea, I was assuming they’d be junk, but there’s only about 30 pieces (flea market lot buy) My novice reloading brain was wondering if they could ever be resized back using a sizing die, but I think I’ll just pitch em (unless one of you guys wants them?
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Re: What did this to the neck of these .308 rounds?

Postby Rowdy Roddy on Tue Sep 28, 2021 8:48 am

Bergie wrote:Yea, I was assuming they’d be junk, but there’s only about 30 pieces (flea market lot buy) My novice reloading brain was wondering if they could ever be resized back using a sizing die, but I think I’ll just pitch em (unless one of you guys wants them?


I think you could save them but you would have to expand the neck larger than 308 so you could then FL them back to 308 creating a false shoulder to headspace on and then fireform them in your chamber. I would anneal first or you might get splits. Not sure it is worth the effort being once fired 308 is fairly plentiful and innexpensive.
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Re: What did this to the neck of these .308 rounds?

Postby OldmanFCSA on Wed Sep 29, 2021 11:59 am

If you need 308WIN cases, come to my place and I will give you 50 7.62X51 RA-70 cases that are clean ready to be loaded = FREE.
:welcome:

I've used these cases to resize down to 243WIN with no issues if done properly.
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