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QuestionableMaynard8130
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case forming question
Dec 19th, 2013 at 11:20pm
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I've been running a few full length 38-55 cases through my 8.15x46r dies to create 8.15x52r cases..   I am getting a little bit of dimpling on the shoulder and the transition from the body to the shoulder.    I know its not terrible uncommon; I've had it happen on occasion in the past when forming commercial and mil. 308 brasss down to the 6.5 redding/.260 Rem though jot as frequently as I am having now.  Past experience is that in most cases fire forming blows them right back out.   it seems more frequent and severe with about 40 Dominion CIL cases---one of which developed a small split coming out of the die.

I have a couple questions:

What causes it to happen ?    I'm using the "imperial sizing wax" what ever it is made out of.  I don't know if more or less would make a difference.

Does brass "harden" simply with age?  The CIL is very clean once-fired in original boxes. It came form an estate sale and I suspect it had been setting on a shelf for quite a few years. I'm wondering if annealing might help?
  

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marlinguy
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Re: case forming question
Reply #1 - Dec 20th, 2013 at 12:08am
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Too much lube is usually the cause of dimples. Haven't used Imperial, but had similar issues when I used RCBS case lube. I use spray lube on almost everything now, and have never had dimples with it.
  

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Chickenthief
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Re: case forming question
Reply #2 - Dec 20th, 2013 at 9:17am
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Yes it is a result of to much lube.
When you size excess lube has nowhere to go so it puddles together and make the dimples.
Try lubing the top ½" of the case only.
It will spread downwards as you size the case.
Sizing in 3-4 series of ½" strokes is also a good idea to avoid lube dimples.
  
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QuestionableMaynard8130
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Re: case forming question
Reply #3 - Dec 20th, 2013 at 9:43am
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Which "spray Lube"  are you using?

Would annealing the old CIL brass harm anything?
  

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boats
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Re: case forming question
Reply #4 - Dec 20th, 2013 at 10:07am
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When I use Imperial just put a bit on my fingers every 4 or 5 cases. Handling the case alone wipes it on the base and neck. It takes very little to lube.

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craigster
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Re: case forming question
Reply #5 - Dec 20th, 2013 at 11:21am
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You might try some dry graphite.
  
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ssdave
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Re: case forming question
Reply #6 - Dec 20th, 2013 at 11:46am
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Lube with paraffin.  That avoids wrinkles from lube entirely.

dave
  
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John Boy
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Re: case forming question
Reply #7 - Dec 20th, 2013 at 11:58am
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* Yes, too much lube
* Reform the cases by pulling the press handle down slowly
I do a lot of case reforming and the lube I use is BAG BALM, at most any drug store.
A very light coating with the index finger & thumb is all the case needs and honestly, I have never had a crunched case using  Bag Balm ... even reforming 348 thick wall or thin wall cases.
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MSDS, 99.7% lanolin ... (You need to Login or Register to view media files and links)

BTW, I have been using the same 10oz can for close to 3 years!
  
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Re: case forming question
Reply #8 - Dec 20th, 2013 at 3:06pm
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Being from Canada Ive had lots of experience with the Dominion Brass, and mostly bad. I suspect that the main issue is its too hard. Lots of it in factory loadings from 1950's  to 1970's are split at the neck in the new box. So annealing is certainly a must , but it may be beyond fixing ? I would try to obtain some other brass. But for some reason some of their thinner brass cases such as 38-40, 44-40 and 32-20, may be OK
  
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