Chambering a 9mm?


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Old 05-03-2012, 10:52 PM   #1
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Default Chambering a 9mm?

Hey, I have an un-chambered barrel blank for 9mm that I want to use on a project I'm working on. I've found chambering reamers online, but I would rather not have to pay so much for one. Any suggestions?
I have limited accesses to a lathe. I've read that I could use a 13/32 taper pin reamer, but that I needed to be careful with going too deeply. Would this work?



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Old 05-04-2012, 12:43 AM   #2
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Okay, the 9mm para case is a tapered case. The neck diameter is 0.380", base diameter is 0.392", and the bullet is 0.356"

By my calculations, 13/32" = 0.40625".

Now, how were you going to do that?



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Old 05-04-2012, 02:37 AM   #3
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Did you look at Brownell's for reamers? They are the best source for quality and customer service, even if the price might be lowest. At least you'd know that the reamer will work.

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Old 05-04-2012, 02:48 AM   #4
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http://www.brownells.com/mobile/aspx/search/sku.aspx?sid=11617&pid=17655
I'm thinking that is cheaper than a new barrel.
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Old 05-04-2012, 03:02 AM   #5
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I'm an amateur so I'm not sure, but the only way I've found to make a chambering reamer that did not involve the use of a lathe was done by taking a 13/32 taper pin reamer, which you are right about 13/32 coming out to 0.40625. The reamer he used, however, came to an exact point. Although I'm not a machinist I believe the 0.40625 is the diameter of the upper most part of the reamer.
The directions I read said to cut the reamer to a length of 87 mm. I'm assuming that would be at the point in which the reamer would have a diameter equal to that of the neck. and then it said to use a short piece of tubing with a set screw and place it over the reamer to be used as a stopping point. I'm assuming at this stopping point is where the reamer reaches a diameter equal to the base or less if the cartridge isn't meant to be fully seated into the barrel.

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Old 05-04-2012, 03:13 AM   #6
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(sorry for double posting)

Quote:
Did you look at Brownell's for reamers? They are the best source for quality and customer service, even if the price might be lowest. At least you'd know that the reamer will work.
I'm already over budget so I'm looking for an alternative. I'll give in if I have too, but not until I'm sure I've exhausted all my other choices, but thanks

Quote:
I'm thinking that is cheaper than a new barrel.
Heres what I'm trying to chamber: http://www.gmriflebarrel.com/productdetail.aspx?id=9mm-BLANK

The barrel was cut in half, and the end that was already chambered used in another project.
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Old 05-04-2012, 03:46 AM   #7
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You can rent chamber reamers...



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