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Bulge from bullet setting .40 case have bulge in middle of case

#1 User is offline   ms1454 

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Posted 04 October 2009 - 12:52 PM

I am using a 550 all with Dillion dies and I am reloading .40 with range brass 180 grm TCFM. OAL is 1.128. There is a bulge in the middle were the end of the bullet is in the case all the way around the enitre case. I have tried to some suggestions to not flare and just barley taper crimp. This helped slightly but it is still there. They shoot fine but still worried about it. Any tips? I have a U die on the way already as well.

This post has been edited by ms1454: 04 October 2009 - 12:53 PM

#2 User is offline   G-ManBart 

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Posted 04 October 2009 - 12:57 PM

If they chamber and shoot fine don't worry about it. I assume this gives them a coke bottle shape...sort of narrow in the middle? Do a search on "coke bottle", "hourglass" or "bulge" and you'll find hundreds of references to this.

Generally speaking the answer to 99% of the questions you can come up with here can be found using the search function (it's better than on a lot of sites). ;)
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#3 User is offline   GrumpyOne 

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Posted 04 October 2009 - 01:41 PM

It's a typical Dillon phenom. Like Gman said, lots of references to it on the forum. I've loaded thousands of 40S&W on my 550, all have the "coke bottle" shape. It actually is a good thing, it prevents bullet setback when chambering.
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#4 User is offline   mtcur3 

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Posted 04 October 2009 - 07:54 PM

I use a Lee factory crimp die to smooth mine out.

#5 User is offline   Lonely Raven 

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Posted 05 October 2009 - 06:23 AM

View Postmtcur3, on Oct 4 2009, 09:54 PM, said:

I use a Lee factory crimp die to smooth mine out.


I get the coke bottle on my 9mm stuff on my RCBS Pro2000. Over 5000 rounds an zero issues with it.

#6 User is offline   Mark K 

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Posted 05 October 2009 - 09:29 AM

I get it on every caliber I load. I used a EGW U-die for sizing and that my contribute, but they all work fine.

Don't worry, be happy.


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#7 User is offline   calishootr 

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Posted 05 October 2009 - 11:09 AM

as I recall hearing Dillon dies are actually undersizing the case a bit so thats where your getting the 'hourglass' condition, which if it drops in a guage or the actual gun's barrel??? no sweat, no problem!!!! shoot em up

#8 User is offline   Audifn 

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Posted 05 October 2009 - 11:49 AM

I also get the "bulge" on both my Major 9 cases and my .40s, all my cases are case pro'd before loading, and I've never had an issue with them chambering or not passing the case gauge check.
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#9 User is offline   rfwobbly 

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Post icon  Posted 10 October 2009 - 02:09 PM

View PostG-ManBart, on Oct 4 2009, 03:57 PM, said:

... "coke bottle", "hourglass" or "bulge" and you'll find hundreds of references to this....



"Coke bottle" ??? You guys are selling yourselves short.

That's the "Marilyn Monroe" look !!

This post has been edited by rfwobbly: 10 October 2009 - 02:10 PM

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