Measuring Barrel Twist

Anything shooting related including law and procedure questions.

Moderator: dromia

Forum rules
Should your post be in Grumpy Old Men? This area is for general shooting related posts only please.
Message
Author
Stuck

Measuring Barrel Twist

#1 Post by Stuck »

Is there an easy way to measure the twist rate of an unknown barrel?

I'm assuming a smith can do it but is there a diy method that is alluding me?
User avatar
meles meles
Posts: 6335
Joined: Mon Jun 06, 2011 8:17 pm
Home club or Range: HBSA
Location: Underground
Contact:

Re: Measuring Barrel Twist

#2 Post by meles meles »

Clearly...
Badger
CEO (Chief Excavatin' Officer)
Badger Korporashun



Quidquid latine dictum sit altum viditur.
"Quelle style, so British"
waterford103
Posts: 1076
Joined: Fri Feb 01, 2013 3:34 pm
Home club or Range: Aberdeen FBGC
Location: North-East Scotland
Contact:

Re: Measuring Barrel Twist

#3 Post by waterford103 »

It involves a cleaning rod and some sticky tape .


:shakeshout:
"This year will go down in history. For the first time, a civilized nation has full gun registration. Our streets will be safer, our police more efficient, and the world will follow our lead into the future!"
Adolph Hitler – 1933
Stuck

Re: Measuring Barrel Twist

#4 Post by Stuck »

Would you founts of wisdom care to elaborate please?
User avatar
Sandgroper
Full-Bore UK Supporter
Posts: 4735
Joined: Sat Nov 06, 2010 3:45 pm
Location: Stanley, Falkland Islands
Contact:

Re: Measuring Barrel Twist

#5 Post by Sandgroper »

Use a patch of a size that will engage the rifling when you pull it through.

Mark the top of the rod at the barrel. Pull the rod through and when the original mark has done a complete turn, mark the rod again and measure between the marks on the rod to get the twist rate.

I usually do it 2 or 3 times to make sure I get consistent result.

HTH
“The standard you walk past is the standard you accept.”

Lieutenant General David Morrison

I plink, therefore I shoot.
User avatar
meles meles
Posts: 6335
Joined: Mon Jun 06, 2011 8:17 pm
Home club or Range: HBSA
Location: Underground
Contact:

Re: Measuring Barrel Twist

#6 Post by meles meles »

Put a mark, ie a bit of sticky tape or a paint mark, on a cleaning rod at the pawdle end. Slide the rod through the barrel and count how many times the mark rotates in a given length of push. If it rotates once in 8 inches that is the twist rate. If it rotates once in 12 inches, that is the twist rate.
Badger
CEO (Chief Excavatin' Officer)
Badger Korporashun



Quidquid latine dictum sit altum viditur.
"Quelle style, so British"
User avatar
dromia
Site Admin
Posts: 20230
Joined: Sat Nov 06, 2010 4:57 am
Home club or Range: The Highlands of Scotland. Cycling Proficiency 1964. Felton & District rifle club. Teesdale Pistol and Rifle club.
Location: Sutherland and Co Durham
Contact:

Re: Measuring Barrel Twist

#7 Post by dromia »

Some echo in here.
Image

Come on Bambi get some

Imperial Good Metric Bad
Analogue Good Digital Bad

Fecking stones

Real farmers don't need subsidies

Cow's farts matter!

For fine firearms and requisites visit

http://www.pukkabundhooks.com/
Stuck

Re: Measuring Barrel Twist

#8 Post by Stuck »

sign92
User avatar
meles meles
Posts: 6335
Joined: Mon Jun 06, 2011 8:17 pm
Home club or Range: HBSA
Location: Underground
Contact:

Re: Measuring Barrel Twist

#9 Post by meles meles »

See, oomans ! Sometimes we can be helpful...
Badger
CEO (Chief Excavatin' Officer)
Badger Korporashun



Quidquid latine dictum sit altum viditur.
"Quelle style, so British"
User avatar
Sandgroper
Full-Bore UK Supporter
Posts: 4735
Joined: Sat Nov 06, 2010 3:45 pm
Location: Stanley, Falkland Islands
Contact:

Re: Measuring Barrel Twist

#10 Post by Sandgroper »

meles meles wrote:See, oomans ! Sometimes we can be helpful...
2 minutes too late! :lol:
“The standard you walk past is the standard you accept.”

Lieutenant General David Morrison

I plink, therefore I shoot.
Post Reply

Who is online

Users browsing this forum: No registered users and 4 guests