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Blame it on jthhapkido! (my new toy)

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depserv:
Am I reading this wrong, or does the carbine-length barrel not add much to velocity?
http://www.ballisticsbytheinch.com/9luger.html

I've wanted to get a pistol caliber carbine for quite awhile and one that takes Glock magazines would be ideal.  I took a quick look at the PSA site and the ones that looked interesting were sold out.  Maybe they're becoming pretty popular. 

I'd say they'll be more popular if loyal Americans ever take control of government and the illegal 16" minimum barrel length is removed.  If the longer barrel doesn't add significantly to power it's nothing but a bastardization by illegal government edict.  Normally pistol calibers go with shorter barrels. 

jarelj:
According to this article:
https://www.shootingillustrated.com/articles/2011/3/4/pistol-caliber-carbines/

A 16 inch barreled 9mm carbine will generate 230 fps increased velocity vs. a 4-5 inch pistol barrel.

depserv:
I don't know a lot about ballistics, which is why I asked.  It looks like roughly a 20% increase in velocity with the longer barrel (which varies from one load to another).  Is that a significant increase?  There has been a big debate over whether there is a practical difference between say 9mm and .40 caliber.  So is the increase in power from the longer barrel enough to affect stopping power?

There are reasons beyond increased power to have a pistol caliber carbine, like greater accuracy, and I expect to be buying one.  I'm just curious about that one aspect of it. 

abbafandr:
bkoenig, didn't see that coming :P  Here it is

JTH:

--- Quote from: jarelj on July 27, 2016, 10:00:10 PM ---I got one too, these things are FUN!  Wilson Combat AR9

--- End quote ---

Whew, those looked cool but were WAAAAAAYYYY out of my price range.

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