Author Topic: Shocked. 270 Winchester case(s) WILL NOT neck down in sizing die.  (Read 135 times)

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Offline Land_Owner

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In hundreds of thousands of sizing cases, I have NEVER had a case(s), two (2) 270 caliber Winchester brass exclusively, that REFUSED to neck down in the sizing die. 

After FULL LENGTH sizing (two blocked die to shell holder and overcam on Rockchucker) the 0.277" mic'd bullet DROPS INSIDE THE CASE with ease.  No neck tension at all.  I resized them again.  Same result.  Not doing it again or I will go insane expecting a different result.

I will mic the sizing button...stand by.  Nope.  0.2745" (+/- 0.0005") sizing button.

Necks are mic'd at 0.2985" out to out - so that SHOULD be "squeezed" by the sizing die - WTH?

Cases are both trimmed, as all others, to 2.540".  Neck of case above shoulder is fire formed at 0.60" on each.

Offline oldandslow

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Re: Shocked. 270 Winchester case(s) WILL NOT neck down in sizing die.
« Reply #1 on: November 17, 2020, 03:51:27 AM »
I'm late as usual but anneal the necks and give it another try.

Offline orerancher

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Re: Shocked. 270 Winchester case(s) WILL NOT neck down in sizing die.
« Reply #2 on: November 17, 2020, 05:20:44 AM »
I'm late as usual but anneal the necks and give it another try.

+1

Offline Land_Owner

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Re: Shocked. 270 Winchester case(s) WILL NOT neck down in sizing die.
« Reply #3 on: November 17, 2020, 08:27:10 AM »
I hear you...but am skeptical.  Can I do that with a live primer in its pocket?  Guess I am gonna find out...

Offline orerancher

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Re: Shocked. 270 Winchester case(s) WILL NOT neck down in sizing die.
« Reply #4 on: November 17, 2020, 09:40:48 AM »
I hear you...but am skeptical.  Can I do that with a live primer in its pocket?  Guess I am gonna find out...

Think I would punch the Primer out...

Offline Ranger99

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Re: Shocked. 270 Winchester case(s) WILL NOT neck down in sizing die.
« Reply #5 on: November 17, 2020, 03:26:15 PM »
Just me, but unless I had many
of those cases, I'd flatten every
one of em with the hammer I
keep under the bench for that
purpose, and they would reside
in the coffee can with the rest of
the problem cases that went there.
I had some a good while back that
I spent way too much irreplaceable
time on, and I decided no more no
more.  I also sold my pocket swager
and unless someone gifts me several
5 gallon buckets of brass, I won't put
any more time toward such a project.

Offline oldandslow

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Re: Shocked. 270 Winchester case(s) WILL NOT neck down in sizing die.
« Reply #6 on: November 18, 2020, 03:02:59 AM »
I hear you...but am skeptical.  Can I do that with a live primer in its pocket?  Guess I am gonna find out...

Like orerancher said, just punch the primer out. Be sure to save it. Them little critters is gittin' scarce. However, if you anneal it correctly there won't be enough heat get to the base to bother it but why take a chance.