Thread: Checking barrel twist

Trying to test the twist rate of my cz 223 , using cleaning rod and measuring the distance it takes to turn 180 deg .last time I got different results so gave up . Now I want to check again , any tips ?

With a fine felt pen run a line straight down the rod It must be parallel and not wander. put a patch on and pull it into the bore so it starts rotating. Put a pencil mark or similar on the muzzle next to the line on the rod and mark the rod. Pull the rod through till the line and dot match and mark the rod again. Repeat till u run out of barrel. Measure the distance between the marks on the rod and average It needs to be a full 360 rotation to get the twist rate correct.

Originally Posted by Marty Henry

With a fine felt pen run a line straight down the rod It must be parallel and not wander. put a patch on and pull it into the bore so it starts rotating. Put a pencil mark or similar on the muzzle next to the line on the rod and mark the rod. Pull the rod through till the line and dot match and mark the rod again. Repeat till u run out of barrel. Measure the distance between the marks on the rod and average It needs to be a full 360 rotation to get the twist rate correct.

Thanks my bad did mean 360 . Pretty much did what you said and getting close to consistent 1in 12 twist . Yet last time was all over the place . All good now cheers

CZ 527s in .223 will be 1 in 12" unless you have the varmint kevlar stock version, then its 1 in 9".

The older stick out magazine CZ 527s in .223 will be 1 in 12" unless you have the varmint kevlar stock version, then its 1 in 9".
Not sure about the newer flush magazine versions.