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Old 06-01-2012, 09:01   #1
cowboy1964
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Are Sig barrels really this slow?

http://www.hkpro.com/forum/hk-handgu...elocities.html

Many types of 9mm ammo tested. The G19 was consistently the fastest and except for one or two cases the P2000 (3.66" barrel) beat even the P226 (4.41" barrel). I guess that polygonal rifling is the difference? But still, I can't believe a 3.6" barrel is faster than a 4.4" one.

Last edited by cowboy1964; 06-01-2012 at 09:03..
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Old 06-01-2012, 09:13   #2
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The barrel on the P226 is also has polygonal rifling.

So, not sure.
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Old 06-01-2012, 09:20   #3
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Quote:
Originally Posted by M&P15T View Post
The barrel on the P226 is also has polygonal rifling.

So, not sure.
I believe Sig barrels use standard land and groove rifling and not polygonal.
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Old 06-01-2012, 09:25   #4
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My P226 is "slower" than any 9mm I have run side by side chronograph tests with.
Including Colts of 5" and 4.25", Plastic M&P, and G17.
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Old 06-01-2012, 09:33   #5
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Quote:
Originally Posted by M&P15T View Post
The barrel on the P226 is also has polygonal rifling.

So, not sure.
Sig barrels are hammer forged, but have conventional rifling.
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Old 06-01-2012, 09:50   #6
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Quote:
Originally Posted by m2hmghb View Post
I believe Sig barrels use standard land and groove rifling and not polygonal.
Quote:
Originally Posted by arclight610 View Post
Sig barrels are hammer forged, but have conventional rifling.
I could swear the P226 I owned about a decade ago had polygonal rifling. Unless I'm getting it confused with the USP40 I owned at about the same time.
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Old 06-01-2012, 10:56   #7
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Just happen to have my P239 broken down in front of me for cleaning. A quick look confirmed it has standard rifling, not polygonal.
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Old 06-01-2012, 11:02   #8
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Quote:
Originally Posted by M&P15T View Post
The barrel on the P226 is also has polygonal rifling.

So, not sure.
Quote:
Originally Posted by arclight610 View Post
Sig barrels are hammer forged, but have conventional rifling.
Quote:
Originally Posted by M&P15T View Post
I could swear the P226 I owned about a decade ago had polygonal rifling. Unless I'm getting it confused with the USP40 I owned at about the same time.
I've got an older 226 with conventional rifling, hadn't seen/heard of them doing it any other way, not from the factory at least.
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Old 06-01-2012, 11:45   #9
TxGlock9
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All sigs have traditional rifling. The only companies that I know of that use polygonal rifling is HK and Glock. Bing!
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Old 06-01-2012, 12:20   #10
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Sig uses standard rifling.
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Old 06-01-2012, 12:31   #11
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Magnum Research also uses polygonal rifling.
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Old 06-01-2012, 13:26   #12
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As long as they are accurate does it matter that much?
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Old 06-01-2012, 14:43   #13
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As long as they are accurate does it matter that much?
I think Cowboy was just saying. Then again you have many OCD gun owners that take everything into account. Can't really blame them.
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Old 06-01-2012, 18:47   #14
Bruce M
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I wonder if 15 or 20 fps really makes that big a difference at 1100 fps or would it be statistically insignificant. That said I don't doubt that some types of barrels would be faster than others.
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Old 06-01-2012, 19:05   #15
TalkToTheGlock
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I wonder if 15 or 20 fps really makes that big a difference at 1100 fps or would it be statistically insignificant. That said I don't doubt that some types of barrels would be faster than others.
It would be like you or me or anyone else traveling 59mph instead of 60mph. Would you really feel or see the differnce.
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Old 06-01-2012, 19:15   #16
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Here is the energy formula:

Velocity squared * bullet weight / 450,240 = Ft Lbs of Energy
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Old 06-01-2012, 19:20   #17
cowboy1964
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I'm not really concerned about 20 fps or whatever. And I'm sure Sigs are plenty accurate. I just think it's very interesting that a 3.6" barrel beats a 4.4". The compact Glocks (4" barrel) are such a sweet spot.

The reason I was looking for info like this in the first place is I'm contemplating an HK P2000, SK, or USPc and wanted some chrono data as their barrels are a little on the shorter side relative to the size of the gun. But HK barrels appear to be plenty fast enough.

Last edited by cowboy1964; 06-01-2012 at 19:22..
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Old 06-01-2012, 19:53   #18
Cobra64
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Quote:
Originally Posted by M&P15T View Post

The barrel on the P226 is also has polygonal rifling...
Nope.

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Old 06-01-2012, 21:30   #19
cowboy1964
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Nope.

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Old 06-01-2012, 21:35   #20
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Glocks are known for chrono-ing faster than typical.
With the sig, you just run while you're shooting and make up the difference.
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