38 super sizer. Can it correctly size 9mm brass


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ADKWOODSMAN
June 18, 2012, 08:22 AM
Purchased a 9mm barrel for the super. Can I properly size 9 mm cases in my 38 super carbide RCBS sizer die? I will purchase bell and seat die from RCBS.:)

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cfullgraf
June 18, 2012, 08:32 AM
Resizing, no. The 38 Super and 9x19 cases are sufficiently different that the cases resized in the wrong die will not fit fit properly in the chamber.

You could use the expander and seater dies although the 38 Super expander may be a little large for 9mm, about 0.001" larger. Maybe not, the expander would need to be measured.

Do not be penny wise and pound foolish, get a full set of 9x19 dies.

ADKWOODSMAN
June 18, 2012, 08:34 AM
First I looked up the specs in the Lyman #49 and noticed they were about 1/100th different therefore my thread question.

rcmodel
June 18, 2012, 11:28 AM
You might also notice the .38 Super is a straight case, and the 9mm is a tapered case.

The sizing dies are different.

rc

56hawk
June 18, 2012, 11:49 AM
Yes and no. A friend of mine shoots 9mm major with a short chambered 38 super. He sizes his 9mm brass in the 38 super die. Really not worth it though since a sizing die is only $20.

ADKWOODSMAN
June 18, 2012, 03:11 PM
Yes RC I did notice that but I was sure there we better experimenters than yours truly!
Thanks for the comment 56hawk. I'll spend the $20.

dickttx
June 19, 2012, 09:31 AM
rc, please expand on this.
When I first got into reloading in the late 60's the 9mm was not a very popular cartridge. I remember seeing comments in the reloading manuals to the effect that the 9mm was a tapered case and therefore very difficult and not easily reloaded.
When I got back into guns and reloading after about 40 years of not, the 9mm was, of course, all the rage. I have wondered how the tapered case problem was overcome with today's carbide dies, which are usually just a small ring in the bottom of the die.

brickeyee
June 19, 2012, 02:36 PM
I have wondered how the tapered case problem was overcome with today's carbide dies, which are usually just a small ring in the bottom of the die.

The carbide 9mm dies treat the case as straight wall and squeeze it down further than required.

The look is often referred to as the 'coke bottle' effect.

The bullet expands the case when inserted.
The carbide sizer cannot reach the last bit of the head of the case.

dickttx
June 20, 2012, 10:48 AM
That is what I had thought, brickeye. So why wouldn't the straight wall 38 Super die size the same mouth diameter 9mm?

Jim Watson
June 20, 2012, 03:18 PM
1. The .38 Super is not the same mouth diameter as the 9mm P. Does .004" matter? I think so, when it comes to getting adequate bullet pull.

2. The carbide insert in a 9mm sizing die is longer than the one in a straight case die like .38 Super and is at least slightly tapered. This makes 9mm dies more expensive than .38. Or they were when I was tooling up, a good number of years (decades) ago. They are no different in current catalogs. Economy of scale or cheapening of the product? I dunno.

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