i'm looking for information on shooting 150 and 180 grn, .311 diameter bullets out of a cz 527 in 7.62x39. will these bullets stabilize and at what velocities? and, what is everybody's opinions on whether or not they will stabilize at subsonic velocity? thanks in advance.

http://kwk.us/twist.html
the carbine barrel is 1:9 ..
if your target vel is 1050, the bullet can be 1.22" long..

thanks jeff. thats the number i needed. one more question...does anyone have a sierra 180 grn, .311 diamter pro hunter they can give me the length of? again, thanks

I have fired those bullets,along with 180 cast in my CZ carbine.I used .300 Whisper data to get started.
Also,if you are trying to shoot at 100 yards and beyond,be sure your scope has a good working up and down knob....