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Measuring Barrel Twist
Posted: Wed Feb 12, 2014 8:18 pm
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?
Re: Measuring Barrel Twist
Posted: Wed Feb 12, 2014 8:19 pm
by meles meles
Clearly...
Re: Measuring Barrel Twist
Posted: Wed Feb 12, 2014 8:21 pm
by waterford103
It involves a cleaning rod and some sticky tape .
:shakeshout:
Re: Measuring Barrel Twist
Posted: Wed Feb 12, 2014 8:27 pm
by Stuck
Would you founts of wisdom care to elaborate please?
Re: Measuring Barrel Twist
Posted: Wed Feb 12, 2014 8:31 pm
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
Re: Measuring Barrel Twist
Posted: Wed Feb 12, 2014 8:33 pm
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.
Re: Measuring Barrel Twist
Posted: Wed Feb 12, 2014 8:35 pm
by dromia
Some echo in here.
Re: Measuring Barrel Twist
Posted: Wed Feb 12, 2014 8:58 pm
by Stuck
sign92
Re: Measuring Barrel Twist
Posted: Wed Feb 12, 2014 9:02 pm
by meles meles
See, oomans ! Sometimes we can be helpful...
Re: Measuring Barrel Twist
Posted: Wed Feb 12, 2014 9:07 pm
by Sandgroper
meles meles wrote:See, oomans ! Sometimes we can be helpful...
2 minutes too late! :lol: