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Discussion Starter #1
Hello DC!
I had a quick thought when I was considering the effective range of the 9mm round when fired from a carbine type rifle. Most of the data I found seemed to agree that 150 yards was the average effective range of the round when fired from a 16 inch barrel. That is not to say that the round can't be deadly or accurate at 200 yards or greater. However luck seems to play more of a role than skill at greater ranges. However 150 yards just isn't enough range for yours truly and I like a challenge so I ask myself "how does one increase the range and accuracy of the 9mm"?

I thought of a few methods.
1. Do not use a FMJ round as you get 'free' velocity from a hard cast lead round thus increasing range. This works because the lead slips down the barrel easier than the copper and thus retains more velocity.
2. Use a slow burning powder to take advantage of the longer barrel. However the 9mm case limits this somewhat. Something like a +P+ but with slow powder.
3. Use as heavy as a round as possible to prevent the weather from moving your shot too much. (this can be debated, as I am uncertain)

Now we come to the meat of the question....aerodynamics.
3. I know that in rifle rounds spitzer style bullets travel farther because of their aerodynamically sharper profile. So I thought I'd look around for 9mm boat-tail spitzer bullets. I didn't find much. Does anyone know if a 9mm spitzer bullet would even work in a carbine?
Are they produced anywhere? If not, can they be made?

Would a some enterprising hand loader like to try an all lead, slow powder burning spitzer 9mm round for the greater good of carbine shooters everywhere?
 

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Considering the case size, and the fact than most fast to medium fast powders already pretty much fill the case, you are going to have a difficult fitting medium to medium slow powders in the case, even with normal pistol bullets.

Spitzers are long and you will be hard pressed to find anything that, even seated over a compressed load of powder, does not exceed the maximum overall length. And to keep it below max OAL, you will have to reduce the powder charge. Both situations are self-defeating. Then you come to the problem of pressures exceeding SAMMI levels ... And then you have to find 9mm spitzers ...

This is not an experiment that I personally would undertake. It's not worth the effort. Even .30 Carbine (which was created as a substitute pistol round) isn't good for much more than 150 yards and it's a heck of a lot hotter than any 9mm, even 9mm SMG ammo.
 

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You can put a tarp in the trunk of a car to haul mulch and the like and call it a pickup truck, but it will still be the wrong tool for the job.

Same thing for the 9mm carbine. You could stretch it out to (perhaps) 200 yards, but what's the point?

Matt
 

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Discussion Starter #4
What about re-chambering the carbine for .357 sig? Assuming it could survive the pressure, that would increase the range without too much over all cost for the conversion.
 
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