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Can a .380 round damage a P365? Login/Join 
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It looks like some got mixed in a box I had in the bottom of my safe. It stovepiped but ran 9mm fine after that.

I was testing out a new grip and flat trigger and it wouldn't hit the side of a barn after the .380 round went through. Wondering if a new barrel is in order.
 
Posts: 42 | Location: N. TX | Registered: June 22, 2019Reply With QuoteReport This Post
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I'd say it's unlikely unless the bullet got stuck and you fired another one behind it.
 
Posts: 8127 | Location: The Red part of Minnesota | Registered: October 06, 2002Reply With QuoteReport This Post
For real?
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You’ll be fine.



Not minority enough!
 
Posts: 6391 | Location: Cleveland, OH | Registered: August 09, 2007Reply With QuoteReport This Post
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I too would be surprised if a single 9mm Kurz fired in a 9x19mm chamber would cause permanent damage. Scrub the bore and visually inspect for any bulging or other abnormalities. I somehow wonder if the new grip and trigger are detrimental to your accuracy.
 
Posts: 2656 | Location: Western PA | Registered: July 20, 2010Reply With QuoteReport This Post
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It is far most likely that the installation of the new grip and trigger has affected accuracy than firing of a .380 round.
The .380 probably only fired because it was held in place by the extractor because if it chambered like it should in a 9mm chamber it would have been too far forward in the chamber for the firing pin to reach it-unless you have a super long firing pin, which would then pierce primers on 9mms.


The Islamic terrorist express: Go directly to Allah, do not pass hell.
 
Posts: 1368 | Location: Xanadu | Registered: May 07, 2006Reply With QuoteReport This Post
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Should be fine in theory. I'd pop the barrel and look for a bulge with the following.

1. Look down the barrel at a light so you can see the rifling. If you see a dark ring then that's possibly a bulge.
2. Slide the barrel into the slide from the front like youre pointing at the firing pin, and see if it catches on the barrel before stopping on the chamber/recoil lug area.

If neither of the above is a thing I'd not think too hard about it. I ran a round of 40 through a 45 1911 and besides not cycling the slide it was fine.


~You are thoroughly confused. Even your confusion is confused. You're confused squared. -Para~
 
Posts: 2059 | Location: Pnw | Registered: March 21, 2009Reply With QuoteReport This Post
E tan e epi tas
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If several .40 rounds won’t damage a .45 1911 I think you will be fine.
Uhhhh, uuuhh friend mixed up some ammo many years ago. Wink Frown

I just about turned white when I realized what I had done and why I was having so many malfunctions. I was THRILLED to have all my fin......errrr my friend was thrilled to have all his fingers. Smile


"Guns are tools. The only weapon ever created was man."
 
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Nullus Anxietas
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quote:
Originally posted by opticsguy:
I was testing out a new grip and flat trigger and it wouldn't hit the side of a barn after the .380 round went through.

I think it's more likely you than the gun.




"America is at that awkward stage. It's too late to work within the system,,,, but too early to shoot the bastards." -- Claire Wolfe
The dominant media is no more "mainstream" than leftists are liberals.
 
Posts: 16620 | Location: S.E. Michigan | Registered: January 06, 2008Reply With QuoteReport This Post
Freethinker
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Many 40 S&W rounds have been fired in 45 ACP chambers, many 9mm cartridges have been fired in 40 S&W chambers, and even a few 357 SIG rounds fired in 40 S&W chambers, all without causing any damage except to egos. The 380 Auto cartridge uses the same size bullet as 9mm, so I cannot imagine it would have any adverse effect.




“The terror of the Roman arms added weight and dignity to the moderation of the emperors. They preserved peace by a constant preparation for war; and while justice regulated their conduct, they announced to the nations on their confines, that they were as little disposed to endure, as to offer an injury.”
— Edward Gibbon, The Decline and Fall of the Roman Empire
 
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I looked at the barrel when cleaning. A lot if chunks of stuff, but it cleaned up nicely. I would think lead and copper couldn't damage a steel barrel, but you never know.
 
Posts: 42 | Location: N. TX | Registered: June 22, 2019Reply With QuoteReport This Post
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No problem.

If you haven't shot a 9mm through a .40 or a .40 through a .45, you know somebody who has. Case usually bulges a little and the gun often won't cycle, but otherwise not a problem.
 
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The Constable
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I watched a guy with a Smith 25-7 a .45 Colt revolver ,spraying bullets at the 50 yd steel plate.

But the report was odd, so I walked over. He was shooting full boat .44 mags out of that poor Smith!

The rest is a long story but that revolver survived.
 
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It's not you,
it's me.
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I’ve done that a bunch of times, not a big deal.




 
Posts: 6101 | Location: Philadelphia, Pa | Registered: September 08, 2005Reply With QuoteReport This Post
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I noticed some rounds in an ammo can that appeared to be too long..... turns out my dillon 650 will sometimes load a 380 just like it was a 9 mm..... they functioned just fine.... d I c k


"Take a kid shooting"
 
Posts: 24 | Location: Wilmington NC | Registered: February 12, 2006Reply With QuoteReport This Post
His diet consists of black
coffee, and sarcasm.
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The .380 is smaller (at the base) than 9mm Luger. I would expect the case to bulge severely at this point. Unless the case blows out I don't see how it could damage the gun. The bullet is the same diameter and there is enough power to push it out of the barrel, so no worries about getting a bullet stuck.
quote:
Originally posted by RAMIUS:
I’ve done that a bunch of times, not a big deal.

Is this hyperbole? A bunch of times? Anybody can make a mistake, but the same one multiple times says you need to review safety procedures, like only putting out one gun and its ammunition at a time.
 
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It's not you,
it's me.
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quote:
Originally posted by egregore:
The .380 is smaller (at the base) than 9mm Luger. I would expect the case to bulge severely at this point. Unless the case blows out I don't see how it could damage the gun. The bullet is the same diameter and there is enough power to push it out of the barrel, so no worries about getting a bullet stuck.
quote:
Originally posted by RAMIUS:
I’ve done that a bunch of times, not a big deal.

Is this hyperbole? A bunch of times? Anybody can make a mistake, but the same one multiple times says you need to review safety procedures, like only putting out one gun and its ammunition at a time.


I did it twice by accident at the range. Then I got curious and tried it a few more times just to make sure Big Grin





 
Posts: 6101 | Location: Philadelphia, Pa | Registered: September 08, 2005Reply With QuoteReport This Post
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quote:
The .380 is smaller (at the base) than 9mm Luger. I would expect the case to bulge severely at this point. Unless the case blows out I don't see how it could damage the gun. The bullet is the same diameter and there is enough power to push it out of the barrel, so no worries about getting a bullet stuck.


Here's a pic of one of the casings I found
 
Posts: 42 | Location: N. TX | Registered: June 22, 2019Reply With QuoteReport This Post
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There was one PD that would practice malfunctions by putting a random .380 in a 9mm Beretta magazine. The Beretta would feed and fire the .380, but not cycle; jam!
 
Posts: 2806 | Location: Florence, Alabama, USA | Registered: July 05, 2001Reply With QuoteReport This Post
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I think that's called "fire formed"!! Big Grin Big Grin
 
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Freethinker
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quote:
Originally posted by Jim Watson:
There was one PD that would practice malfunctions by putting a random .380 in a 9mm Beretta magazine.


Ooh! Good idea.
Thanks for mentioning that.




“The terror of the Roman arms added weight and dignity to the moderation of the emperors. They preserved peace by a constant preparation for war; and while justice regulated their conduct, they announced to the nations on their confines, that they were as little disposed to endure, as to offer an injury.”
— Edward Gibbon, The Decline and Fall of the Roman Empire
 
Posts: 40662 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
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