9mm revolver question

[Nightcrawler]

Just a thought.

For those 9mm revolvers? Can you load .380ACP into the moonclips and shoot it from a 9mm revolver? Are the case diameters and head sizes the same?

Thanks.

 

[Hal]

Cases:
9mm tapers from .391 down to .380
.380 tapers from .374 down to .373

Case head:
9mm - .394
.380 - .374
*Source - Lyman's 47th Edition

Because of the higher cost/lower power of the .380 there's little to gain from doing it.

 

[Nightcrawler]

I know this. I was merely curious.

 

[Hal]

I know this

Yeah,,,well maybe the some few hundred other readers that may view this don't....

 

[only1asterisk]

In an emergency, I might consider it. I woudn't promote the practice.

David

 

[Nightcrawler]

I know this

I know that .380 is more expensive than 9mm. I thank you for the information on case taper.

Is it enough to make a difference? Surely low pressure .380 isn't going to hurt a 9mm revolver cylinder in any case?

 

[only1asterisk]

Cases will swell up, they may not seal too well. Brittle brass might split. Not to mention that the round is going to lying on the bottom of the chamber or at an angle (depending on just how poor your full moon clip fit is). You're going to increase wear on the chambers (more than shooting 38's in a 357 because the round is off center to a greater degree), cylinder throats and forcing cone.

I don't think you will break anything, and I really don't think you will increase wear to a detectable degree, but it isn't my gun.

David

 

[Hal]

Surely low pressure .380 isn't going to hurt a 9mm revolver cylinder in any case?

Probably not. Not so much because of the lower pressures of the .380 but because of the high quality of 9mm revolver and the limited appeal of it.

Basicly, I think anyone that owned a 9mm revolver would be the type to have the common sense not to do it;even if they did try it just "to see", they have the high quality of the mfg working for them.

Every 9mm revolver I can think of off the top of my head are all top shelf items.