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Discussion Starter · #1 ·
ok, so i'm not necessarily going all Glock, see i'm going to get another Mech Tech CCU (carbine conversion unit). I've been considering the 357 SIG with the 16.5" barrel as being a good choice but i'm also looking at the straight 40 S&W, the 45 ACP or even the 10mm.

Any thought from the masses?

P.S. I'm also posting this on the Mech Tech sight forum, incase anybody was curious.
 

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Everything but .40 will be more expensive to shoot, but they'll all be a lot of fun! I'd go either .357 Sig or 10mm.
 

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Glockn Rollin
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.357 or 10mm because of the ballistics. I believe these will be better for a carbine.
 

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I vote for the 10mm.
 

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Carry on my friends!!!!
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10mm because you could push some rounds over 2500fps :)
 

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Glockn Rollin
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Can you really get 2500 fps on a 10mm cartridge? Because that is rifle velocity, and some awesome stuff happens at rifle velocity in the world of ballistics. I think it is funny when people argue over a 9mm cartridge having 1200fps and a .45 having 900 some-odd fps. In reality that makes no difference, but 2500, now that can do something haha.
 

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Carry on my friends!!!!
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Oh yea I'd imagine so as the powder has more time to burn you already have some rounds that push 1100-1500fps out of a 4.6" glock 20 barrel and these carbine barrels are what 16-16.5" so I'd be guessing around an easy 2000-2500fps at that length!!!
 

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jimmyalbrecht said:
Can you really get 2500 fps on a 10mm cartridge? Because that is rifle velocity, and some awesome stuff happens at rifle velocity in the world of ballistics. I think it is funny when people argue over a 9mm cartridge having 1200fps and a .45 having 900 some-odd fps. In reality that makes no difference, but 2500, now that can do something haha.
135 Corbon is said to hit 1650 fps out of a 4.6" barrel... 16" I'm not sure, but I'd guess close to 2000 fps... As for energy, I've seen 625 out of a 4.6"... More from a rifle barrel I'd guess too....
 

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jimmyalbrecht said:
Can you really get 2500 fps on a 10mm cartridge? Because that is rifle velocity, and some awesome stuff happens at rifle velocity in the world of ballistics. I think it is funny when people argue over a 9mm cartridge having 1200fps and a .45 having 900 some-odd fps. In reality that makes no difference, but 2500, now that can do something haha.
The only auto loading pistol cartridge that I know of that can get even close to 2000fps out of a 4.6" barrel is a 9x25 Dillon. Double Tap has these at I believe 1975fps chronographed and pushing close to 880 ft/lbs behind it. It's basically a. 357sig but instead of a .40 case necked down to a 9, it's a 10mm case necked down to it. It's an awesome round.
 

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Discussion Starter · #18 · (Edited)
The gains are not quite as much as some people think 9mm, .40 s&w, .45 ACP and .357Sig only gain from 200-300 fps from a 4" to 16" barrel and 10mm a little higher then that.

This is all based off of info from this website: http://ballisticsbytheinch.com/calibers.html

This website was posted on the Mech Tech forum so this is not from testing from me but someone else and shows various calibers and the effect of muzzle velocity and energy for certain kinds of ammo at various barrel legnths from 2"- 18".
 

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ckuenzer331 said:
I know what my next firearm related purchase is!!! :)
Haha right on man. It's as loud as a .223 though, no lie. I had to use foam plugs and over the ear at my local indoor range. I actually was asked to move to the rifle range because other people were complaining about the noise. Good stuff
 
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