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 Determining twist rate

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Smokin' Joe
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PostSubject: Determining twist rate   February 9th 2015, 11:23 am

I was trying to determine the twist rate for my Sharon Barrel.  I put a tight fitting oil patch on a bench rod and ran it down the barrel to the breech plug. I then wrapped white medical tape around the rod at the muzzle making equally spaced ink marks on the tape. One on the top and one on each side.  I pull the rod out watching it turn.  It makes 1/4 turn at approximately 19".  I multiply that by 4, comes out to 1:78  I'm thinking it is probably 1:72??  Any thoughts?

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Bear Claw
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PostSubject: Re: Determining twist rate   February 9th 2015, 12:18 pm

How long is the barrel? Can you make a 1/2 turn?

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PostSubject: Re: Determining twist rate   February 9th 2015, 12:23 pm

1:72 sounds about right for a Sharon.
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Smokin' Joe
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PostSubject: Re: Determining twist rate   February 9th 2015, 12:27 pm

The barrel measured to the tang is 29 1/4".  The ramrod goes inside the barrel 27 5/8".  So no I can not make a 1/2 turn.

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