Author Topic: determining rate of twist  (Read 407 times)

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Offline manofthe45

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determining rate of twist
« on: August 15, 2011, 05:10:53 AM »
How can I determine a guns rate of twist without sending the gun to my smith
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Offline quickdtoo

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Re: determining rate of twist
« Reply #1 on: August 15, 2011, 05:50:48 AM »
See the twist rate info in the H&R FAQs, there are a couple methods listed.

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Offline gunnut69

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Re: determining rate of twist
« Reply #2 on: August 15, 2011, 10:54:29 AM »
The simplest way is to install a tight fitting patch on a cleaning rod jag. Install into the bore and with a marker mark the length of the rod from the muzzle to about 20 inches or so. Try to keep it even on the side. Also mrk the barrel where the mark on the rod begins. I use a bit of masking tape on the barrel to receave the mark. Insert the rod so that the mark is allowed to rotate freely with the jag turning the rod. When the mark on the rod comes completely around to the ,ark on the barrel, mark the rod and measure between that mark and the begining of the mark on the rod. This will be one turn in--- . This depends on a tight patch and the free movement of the ball bearing handle on the cleaning rod..
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Offline Nobade

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Re: determining rate of twist
« Reply #3 on: August 20, 2011, 03:41:03 AM »
I do the same thing as Gunnut, only use a tight fitting bronze brush in the bore and clip a clothes pin on the rod. Push it up against the muzzle, pull the rod out until it rotates once, and measure the distance with a ruler. Do this a few times to make sure you're consistant and you can get very close. 
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