Twist rate on a Tactical sport barrel?

[twister]

I would like to know the twist rate on a Tactical sport 9mm barrel, I've checked around the internet and come up with nothing, any help on this is greatly appreciated, Dave.

[Steve RA]

Check it yourself, put a new brush on a cleaning rod, mark the 12 O'clock position on the rod and pull until it has rotated back to 12 position.  Measure length of rod required and that is your rate of twist.  If it's a short barrel and won't make one revolution it will take a little simple math to arrive at the correct answer.

[CZ85Combat]

Most CZ 9mm are 1 in 9

[twister]

Thank you for the information.

[John_]

From a post on The Original CZ Forum dated 4/08/2003 (states 1:10 twist, 6 groove rifling):

 

  In terms of barrel design, there are two important reasons why CZ pistols have a reputation for outstanding accuracy.  First, CZ pistols have six, rather than four, rifling grooves.  Although six grooves have now become more or less standard, four grooves were the norm for many decades.  Smokeless powder had been around for nearly fifty years before designs with six rifling grooves were adopted in significant numbers.  Ceska Zbrojovka appears to have been ahead of the technology curve by at least a decade or so.  (For example, the Mk. I Hi-Powers have four rifling grooves.)  All CZ pistol designs, including the vz/22 and vz/24, have had six rifling grooves.  Second, CZ 75/85 series pistols have a faster rate of twist than many other 9mm designs at @1:10 (as opposed to 1:12-1:14).  This makes them better suited to 124gr and heavier bullets than most other 9mm pistols.  This has been an important factor in their success, since most nations began switching over to 124gr bullets about twenty years ago.  Commercial loads heavier than 124gr began to appear on the market at about the same time that CZ pistols became readily available in the West.  Although 147gr loads are not as accurate in a 9mm CZ as bullets in the 115-135gr range, the CZs handle them much better than some of their competitors.             

 

Link to post: https://czfirearms.us/index.php?topic=14715.0

 

Found a couple on line references which state 1:9.7 twist also. Wikipedia being one of them.

Edited August 30, 2018 by John_
added info

[twister]

Thanks John.

[Foxj66]

1:9.84" is the what CZ calls out for twist rate on 9mm barrels

[twister]

Thanks for the help.

[9146gt]

1 in 250 mm.

 

Tom

[858]

1 in 25 cm.