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Old 12-23-2009, 12:25 PM
bls bls is offline
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Default Pistol Barrel Rifling Twist
I was cleaning several pistols last night and noticed that all of them have a left hand rifling twist with one exception, a model 745, that had a right hand twist.

I checked S&W's parts catalog and they show the exact same part number for both the 645 and 745 so I'm curious as to why my 745 has a right hand twist rather than a left hand twist.

Would anyone that owns a 745 please check their barrel for the twist direction?

Thanks.

bls
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Old 12-23-2009, 04:44 PM
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My 745 has a righthand twist as does my 945. My Colt Commander is a lefthand twist and so are the ones from Kimber. I have an RIA barrel with a right hand twist.
Manufactures are free to make them anyway they so choose. As long as they work I wouldn't worry too much about it.

Bruce
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Old 12-23-2009, 09:47 PM
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Originally Posted by Bruce Lee M View Post
As long as they work I wouldn't worry too much about it.

Bruce
No, I wasn't worried about it and it doesn't make any difference whether the rifling has a left hand or right hand twist, simply thought it was interesting that all the S&W pistols (5 different models, 2 different calibers) on my bench at the time with the exception of the 745 were left hand twist.

I thought maybe it was something along the lines of S&W revolver cylinders turning counter-clockwise (viewed from the rear of the revolver) and Colt revolvers turning clockwise which is due to the different designs of the revolvers.

I don't know how S&W rifles their barrels but, for production purposes, one was think the machinery would be consistent (think ISO-9001 and Six Sigma). Then again, maybe not...

bls
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Old 12-23-2009, 11:31 PM
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They must have put that blank in backwards
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Old 12-30-2009, 09:52 AM
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Blank in backawards would not matter. The twist would still be the same.

Check it out.
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Old 12-30-2009, 11:22 AM
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Blank in backawards would not matter. The twist would still be the same.

Check it out.
That was a joke
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Old 12-31-2009, 08:20 AM
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No Problem. My spelling is backasswerds also.

HAPPY HOLIDAYS.
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Old 12-31-2009, 09:11 AM
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Right-or-lefthand twist is determined by whether a gun is intended for sale in the Northern or Southern hemisphere -- Coriolis Effest, don't you know. ;-)
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Old 01-01-2010, 11:56 AM
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Sounds like an interesting theroy.
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Old 01-03-2010, 10:08 AM
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No Problem. My spelling is backasswerds also. HAPPY HOLIDAYS.
That's Bassackwords ;-)
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645, 945, colt, commander, kimber, sigma

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