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 Post subject: Head scratcher
New postPosted: February 11th, 2018, 4:52 pm 
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De-bulged a bunch of .40 cal today, with my Redding GR-X de-bulging die.

My wife was setting the cases in, and I was pulling the handle. I looked at one case as I was pulling the handle and said to myself "wait, Something's not right". Sure enough, case jammed. Figured I would push it through with another case. WRONG. Still jammed up. Knocked it out with a flat punch, and this is what came out.

Don't know what the first case was. Probably a 10mm. It's longer than a standard .40, but the rim was able to start to insert itself into the mouth of the next case. Question is: Shouldn't a 10mm push all the way through the die, same as a .40?

No big deal. Everything's cool.

Just a couple of funny pictures


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 Post subject: Re: Head scratcher
New postPosted: February 12th, 2018, 8:36 am 
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The 10MM is 0.001" larger in diameter at the base and on the rim than the .40 S&W and in a die that de bulges the brass, that's enough to hang it up.

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 Post subject: Re: Head scratcher
New postPosted: February 12th, 2018, 8:46 am 
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I use the Lee Bulge Buster, which basically just uses the carbide size ring from a Lee Factory Crimp die to do the same task.

Using the Lee, I run both 40 S&W and 10mm cases through it without any issue.


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 Post subject: Re: Head scratcher
New postPosted: February 12th, 2018, 9:09 am 
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Jack Dupp wrote:
I use the Lee Bulge Buster, which basically just uses the carbide size ring from a Lee Factory Crimp die to do the same task.

Using the Lee, I run both 40 S&W and 10mm cases through it without any issue.



I had the Lee. Didn't like it, so I gave it away. I think the Redding is a better quality.

Still not sure what that case is. Looks too long to be a 10mm. Don't want to pull it apart to solve the mystery, as it's a nice conversation piece


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 Post subject: Re: Head scratcher
New postPosted: February 12th, 2018, 11:01 am 
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I am sure it is a 10mm. Sometimes the case head/rim becomes large in diameter with the 10mm due to firing (heavier loads) and trying to size down that solid brass rim can be tough enough to stick in a push through sizer and it takes some effort to get them unstuck.


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 Post subject: Re: Head scratcher
New postPosted: February 12th, 2018, 12:33 pm 
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Sent the pictures to Redding. They said the first case didn't push through because the die was set too high. 10mm is fine for that die. The guy said he's seen as many as three .40 cal cases stack-up on each other like that, because the die was set too low.


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