rate of twist

[anthonycrocker25]

I know this has been asked before but how does a novice finds out the rate of twist in a unmarked barrel.

 

[rmark]

Run a cleaning rod with a tight fitting patch down the barrel, counting the revolutions. Tape a little paper flag on the rod to make it easier to count.

 

[mooman76]

I just mark the rod with a marker. Half a turn in 24" is 1 in 48.

 

[Zonie]

I know this has been asked before but how does a novice finds out the rate of twist in a unmarked barrel.

Putting the other two answers together, first get a cleaning rod or ram rod with a cleaning jag attached to it. Also get a shooting patch or a cleaning patch.
Lightly oil the patch and shove it down the barrel on the cleaning jag until it hits the breech plug.
Put a piece of tape around the cleaning rod so the lower edge if even with the muzzle. Take a pen or marker and make a mark on the tape that lines up with the front sight.

Now, slowly pull the rod, jag and patch back out of the barrel allowing it to rotate as it moves.
When the mark that was aligned with the front sight has rotated 90 degrees from where it started, stop moving the rod. (If we call the starting place 12 o'clock, stop at 9 or 3 o'clock.)
Measure the distance from the face of the muzzle to the lower edge of the tape. Multiply this answer times 4 and write down the answer.
To add more accuracy to the test, continue to move the rod/jag/patch out until the mark has rotated 180° (to 6 o'clock). Measure the distance from the face of the muzzle to the bottom of the tape. Multiply this answer times 2 for the answer.

Do this test at least twice. Three times is better. The reason is, often the cleaning patch will lose it's grip on the rifling and slip while your pulling the rod out of the barrel and if it does slip, it will goof up all of your answers. If you get two answers that are close to being the same, that is probably as good as it gets.

Have fun.

 

[anthonycrocker25]

I would like to thank everyone for there reponse especially Zonie. Right on just had to get my head unstuck.

 

[anthonycrocker25]

O yea 1-66 thanks again.