.357 Carbine: 16 inch beats 18 inch


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LaEscopeta
May 29, 2009, 12:38 PM
Came across this thread:

http://www.thehighroad.org/showthread.php?t=453030

...about a site listing muzzle velocity vs. barrel length for a wide variety of pistol calibers. This page:

http://www.ballisticsbytheinch.com/357mag.html

is for .357 Magnum. Note velocity maxs out with an 16 barrel. Im glad I got my Marlin 1984C cut down to 16. Never missed losing one round out of the magazine.

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ArmedBear
May 29, 2009, 01:07 PM
Depends what loads you put in it.

Something like the IMR 4227 I use probably does get a tad more velocity from a longer barrel, since it's a relatively slow-burning powder. I don't have a 16" barrel to test, though.

zxcvbob
May 29, 2009, 01:13 PM
It probably also depends whether you are using cast bullets or jacketed.

LaEscopeta
May 29, 2009, 01:46 PM
The site lists the ammo used, commercially available pistol ammo with mostly some sort of jacket. So I guess the Buffalo Bore of LEVERevolution stuff, with slower powder, could be faster out of a barrel longer then 16

351 WINCHESTER
May 29, 2009, 07:09 PM
I doubt you could tell the difference in performance between the two.

zxcvbob
May 29, 2009, 07:57 PM
A 158 grain cast lead bullet, even with barrel friction, is still accelerating as it exits a 24" barrel (when loaded with 14 grains of AA#9)

Same load with a 158 grain jacketed bullet seems to max out at about 22".

Either bullet is still gaining at 18". It's mostly academic though, there's not a lot of acceleration left.

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