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November 14, 2022, 04:30 PM
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#1 |
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Senior Member
Join Date: March 26, 2005
Posts: 115
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.380 VS 9mm
is the .380 cartridge the same size as 9mm except for the length ?
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November 14, 2022, 05:01 PM
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#2 |
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Senior Member
Join Date: March 21, 2012
Location: Indianapolis, IN
Posts: 3,977
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No, its smaller.
9mm rim diameter .394, mouth diameter .380 380 rim diameter .374, mouth diameter .373
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November 15, 2022, 08:02 AM
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#3 |
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Senior Member
Join Date: January 13, 2010
Location: Texas
Posts: 306
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Not very much different.
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November 15, 2022, 08:42 AM
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#4 | |
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Senior Member
Join Date: March 21, 2012
Location: Indianapolis, IN
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Quote:
Question is why the comparison? To begin with you could not trim a 9mm down to use it for 380, its too wide. And a 380 wont headspace in a 9mm since it headspaces off the mouth and its too short.
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I don't believe in "range fodder" that is why I reload. |
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November 15, 2022, 09:07 AM
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#5 |
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Staff
Join Date: September 25, 2008
Location: CONUS
Posts: 18,479
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.380 ACP is also a straight-wall (cylindrical) case, whereas the 9mm (9x19) is a tapered case.
https://saami.org/wp-content/uploads...sting-Copy.pdf
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November 15, 2022, 12:49 PM
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#6 |
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Senior Member
Join Date: March 13, 2005
Location: Pennsylvania
Posts: 1,687
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Confusion may be created by the relatively long list of alternate names: Other names for .380 ACP include .380 Auto, 9×17mm, 9mm Browning, 9mm Corto, 9mm Kurz, 9mm Short, and 9mm Browning Court
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November 15, 2022, 01:52 PM
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#7 |
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Senior Member
Join Date: September 19, 2008
Posts: 1,415
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And Corto and Kurz mean "short"
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November 15, 2022, 04:00 PM
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#8 |
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Senior Member
Join Date: December 6, 2014
Posts: 6,446
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Bullet weights for the 9x17 tend to be lighter than for the 9x19
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