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9mm compatability

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Old 05-14-2012, 02:01 PM   #11
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Originally Posted by Ranger-6 View Post
I was able to shoot 9mm out of the .380, but was not able to shoot .380 out of the 9mm. The head-space was about 1/16 inch too short. But, I did try.
Shouldn't that be vise versa? If 9 mm fits in a .380, that strikes me as a dangerous overpressure situation if fired, aside from the 9 mm being longer.

As for the 9x18, it shouldn't fit in either of the others. If it does, don't pull the trigger. 9x18 bullet diameter is .363", 9mm Luger & 9 mm Kurtz (.380 acp) typically run .355" or .356". Pressures could get exciting.
Max pressure for:
.380 ACP - 21,500 psi.
9 mm Makarov - 23,200 psi
9 mm Luger - 35,000 psi (or 38,500 +p)
.380 can be made to fire in a 9 mm Luger, though it's headspacing on the extractor. Probably not dangerous but not a great idea. In a Mak, the situation is probably similar, though the slop in the bore will eradicate anything resembling accuracy.
Even if you can "make it fit," don't mix & match your different calibers.

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Last edited by Overkill0084; 05-14-2012 at 02:06 PM.
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Old 05-19-2012, 02:27 PM   #12
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I don't understand the facsination or need to even think about mixing calibers of ammo and firearms??
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Old 05-19-2012, 03:13 PM   #13
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If you insist on switching calibers, there's a revolver I think called a Medusa model 47 that accepts 25 different rounds. I forgot who makes it.
When they kick out your front door, how you gonna come. With your hands on your head or on the trigger of your gun?

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