9mm ballistics out of a 20" bbl, anybody know?

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[ARCHIVED THREAD] - 9mm ballistics out of a 20" bbl, anybody know?

Posted: 10/8/2005 6:15:04 AM EDT

What kind of a difference would there be between a 20" or 16" bbl? Is this even practical?

Posted: 10/8/2005 10:00:11 AM EDT

[#1]

There's a post on the next page about Chrono results

I don't think a 20in barrel (if you could even find one) would make any kind of sense at all

Posted: 10/8/2005 2:00:12 PM EDT

[#2]

I was just curious and had never heard of a 20" 9mm

Posted: 10/8/2005 2:19:51 PM EDT

[#3]

9mm ammunition is designed to be fired from a pistol, so the powder is probably burned up by 14" or so (guessing). I wouldn't be surprised if velocity is LOST after 16".

Posted: 10/8/2005 2:31:09 PM EDT

[#4]

Quoted:
9mm ammunition is designed to be fired from a pistol, so the powder is probably burned up by 14" or so (guessing). I wouldn't be surprised if velocity is LOST after 16".

+2

And 45acp peaks out of about a 11" bbl. (Think that factoid came from Hatcher's Notebook relating to tests on the M1 Thompson. IIRC)

Posted: 10/8/2005 6:55:27 PM EDT

[#5]

Thanks, guys.

[ARCHIVED THREAD] - 9mm ballistics out of a 20" bbl, anybody know?

AR-15 » Rimfire and Pistol Calibers

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