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'Ballistically and from a physical comparison, the .30 carbine is comparable to a .357 Magnum or .38 Special pistol cartridge, '
Oh, .357 Magnum now goes 1990 FPS and has 990 Ft Lbs of energy?
'Would it be expensive to have say an unchambered AR barrel done in 30 Carbine could you use the same bolt/extractor or would it require extensive mods...! .
A .300 Blackout barrel would be great, with a chamber insert. The bolt would remain unchanged. A carbine mag can fit inside an AR mag, so that would take a little finagling, but you can see how easy it would be. At least so far; it might get more complicated with the gas port size and recoil spring weight but those can be done by trial and error. So basically, if you have a .300 upper, you can have any machinist make the chamber insert and the mag set-up should be fairly straighttforward.
'Really Senior Member'

Especially since I started on the original Culver forum. That had to be about 1998.
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03-28-2016 02:07 PM
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Originally Posted by
carwashchris
Yes I love my M2, but when I shoot my friend's Thompson I get the feeling I'm shooting a more refined weapon. And it's hard to ignore it's nostalgia.
I understand nostalgia, but can't ignore performance. Were I to step into a "street altercation" scenario, I would feel better with an M2 in my hands than a Thompson Submachinegun. The fact that the M2 is lighter, tends to be more accurate and hits harder with Soft Point ammunition pushes the Carbine to the head of the line.
Fun is fun, but when "the fecal matter impacts the air motivator", accuracy and power make the difference.
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The .30 Carbine is a self-loading rifle cartridge.
The .357 S&W Magnum is generally housed in a lever-fed,tubular magazine carbine. It is unlikely that the .357 S&W Magnum will ever be commercially found in a self-loading carbine.
86 years ago (1930) the police relied on lever-action rifles, but no longer. The .30-30 has since given way to the .30 US Army (the .30-06) and then the 7.62 x 51 self-loading rifles.
At 100 yards, the full-power 110 grain .30 Carbine Soft Point load is still traveling at 1602 fps, generating 627 foot-pounds of energy. This is usually more than most .357 S&W Magnum revolvers are generating at the muzzle of a four inch barreled service revolver! 
I'm sorry, but with this information, my bet will continue to rest on the .30 Carbine. 
Thank you very much.
Last edited by Captain O; 03-28-2016 at 02:48 PM.
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Originally Posted by
INLAND44
'Ballistically and from a physical comparison, the .30 carbine is comparable to a .357 Magnum or .38 Special pistol cartridge, '
Oh, .357 Magnum now goes 1990 FPS and has 990 Ft Lbs of energy?
'Would it be expensive to have say an unchambered AR barrel done in 30 Carbine could you use the same bolt/extractor or would it require extensive mods...! .
A .300 Blackout barrel would be great, with a chamber insert. The bolt would remain unchanged. A carbine mag can fit inside an AR mag, so that would take a little finagling, but you can see how easy it would be. At least so far; it might get more complicated with the gas port size and recoil spring weight but those can be done by trial and error. So basically, if you have a .300 upper, you can have any machinist make the chamber insert and the mag set-up should be fairly straighttforward.
Right now I'm in the middle of building myself an AR in 300 . I see it as a modern version of the 30 carbine . It will easily do at 300 yds ( and beyond ) what most people THINK a 30 carbine will do . It can also be handloaded with all the neat 150-168-ish grain special bullets that people only think of in 30-06 terms . And a big plus is the ability to use 200-220-250 grain bullets at sub-sonic ( think suppressor ) . And , it can do it all in a 9-10 inch barrel .
I just think spending the time and money to put the carbine round in this platform with the 300 so available is , well , silly.
Chris
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Originally Posted by
emmagee1917
Right now I'm in the middle of building myself an AR in 300 . I see it as a modern version of the 30 carbine . It will easily do at 300 yds ( and beyond ) what most people THINK a 30 carbine will do . It can also be handloaded with all the neat 150-168-ish grain special bullets that people only think of in 30-06 terms . And a big plus is the ability to use 200-220-250 grain bullets at sub-sonic ( think suppressor ) . And , it can do it all in a 9-10 inch barrel .
I just think spending the time and money to put the carbine round in this platform with the 300 so available is , well , silly.
Chris
Chris,
This never occurred to me at all. If I want to move beyond the .30 Carbine, I step right up to the 7.62 x 39 Soviet
. I really don't need a suppressed .30 Caliber rifle. If I do, I can have a suppressor installed on my MAK-91 barrel, or my .30 Carbine. (I doubt that i'll ever do it). The .30 Carbine is useful out to 150 yards for "serious social situations". There's no need for an expensive new rifle, unless you feel a compelling need to spend money on a new AR-type rifle.
I have been shooting for more than 50 years and neither the 5.56 x 45 nor the .300 Blackout hold any thrills for me.
Whatever melts your butter.
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Well , I acually started by looking at taking a .30 carbine , SBR-ing it and cutting the bbl down to about 12 inches ( leaving just enough room for a type one band to clear the end of a M1A1
folding stock ) . I then did some real 300 yard shooting of several full sized carbines , and was unimpressed . It was very good at 200 and would do the job at 250 , but a lot changed by 300 . I then found out that it was no real task to get much better groups out of the AR15 / 300 platform with bbls as short as 9 inches at 300 yds ( say 3-5 inches rather than a foot plus ) . The 300 Blackout is basicly a 7.62X39 , but with a lot more accuracy due to better case design / platforms / and match bullets . The ability to SBR a lower and have several uppers allows a lot more flexable and fun platform . The case and bbls were designed from the start to work with 100 to 220 + grain pills .
So , yes , after 30 years into the USGI WW2 stuff , I'm going into the dark side .
Chris
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Originally Posted by
emmagee1917
Well , I acually started by looking at taking a .30 carbine , SBR-ing it and cutting the bbl down to about 12 inches ( leaving just enough room for a type one band to clear the end of a
M1A1
folding stock ) . I then did some real 300 yard shooting of several full sized carbines , and was unimpressed . It was very good at 200 and would do the job at 250 , but a lot changed by 300 . I then found out that it was no real task to get much better groups out of the AR15 / 300 platform with bbls as short as 9 inches at 300 yds ( say 3-5 inches rather than a foot plus ) . The 300 Blackout is basicly a 7.62X39 , but with a lot more accuracy due to better case design / platforms / and match bullets . The ability to SBR a lower and have several uppers allows a lot more flexable and fun platform . The case and bbls were designed from the start to work with 100 to 220 + grain pills .
So , yes , after 30 years into the USGI WW2 stuff , I'm going into the dark side .
Chris
Chris: This is not "going to the dark side" this is a departure from a Military Surplus rifle and doesn't belong on the Forum. Think of it as putting a 40 foot neck and 3 foot legs on a giraffe. This isn't
"Militaria" nor is it even close. Another forum might be appropriate for this subject.
BTW, the "thread drift" away from the Carbine vs. Thompson isn't proper, either.
Last edited by Captain O; 04-05-2016 at 03:53 PM.
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"To each his own" Everyone has their own preference as to what they like. The M2 and the TSMG will both do the job at a reasonable range. If the range is greater than what you think the firearm you have is capable of being effective, get a bigger one! Nothing is perfect in the world!!!!!!!!!!!!!!!!!!!!!!!
---------- Post added at 07:39 PM ---------- Previous post was at 07:36 PM ----------
Folks get to responding to 'threads' and they get sidetracked by the conversation. It's just human nature. Why get upset?
M1a1's-R-FUN!!!!!!!!!!!!!!!!!!!!!!!!
TSMG's-R-MORE FUN!!!!!!!!!!!!!
ENJOY LIFE AND HAVE FUN!!!
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Originally Posted by
shadycon
"To each his own" Everyone has their own preference as to what they like. The M2 and the TSMG will both do the job at a reasonable range. If the range is greater than what you think the firearm you have is capable of being effective, get a bigger one! Nothing is perfect in the world!!!!!!!!!!!!!!!!!!!!!!!
---------- Post added at 07:39 PM ---------- Previous post was at 07:36 PM ----------
Folks get to responding to 'threads' and they get sidetracked by the conversation. It's just human nature. Why get upset?
Because if they want to discuss anther arm, they should start anther thread. This was a comparison thread about two specific arms. If they want to discuss another arm (which isn't a surplus arm, nor is it a military cartridge) they need to start another thread on a forum where it is applicable/appropriate.
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Fellas, I am closing this thread. Although the discussion has remained carbine related it is starting to touch a nerve. I think we need to move on now. Thanks
Bill Hollinger
"We're surrounded, that simplifies our problem!"
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