CZ527 7.62x39 bore? for .308 or .311

[y2k]

Is the CZ 527 in 7.62x39mm built for .308 or .311 ie surplus ammo?

 

[Boomer]

From CZ's website:

Referring to the CZ 527 -
Built to CIP specifications, our 7.62×39 chambers are ideal for shooting steel-cased surplus ammo. Designed to shoot .311 bullets, some American brass ammo may not perform as well as the imported steel-cased variety because of SAAMI brass dimensions and varying bullet diameters.

 

[BigUglyMan]

Yeah, it would seem a bad choice for a major manufacturer to chamber the x39 in the .308 bore. Too much liability.

 

[enoch]

Mine shoots the Remington , winchester, Federal and Hornady just fine and is very accurate with all. But the lacquered cases are stiff to eject!

 

[Neilm]

Mine actually measured .310 which is what Cz claims it is. I was able to shoot .308 to .311 bullets accurately but finally settled on sierra .311 125 gr game king as my bullet of choice. It held together well whereas the .310 hornady and remington offerings were very explosive.

 

[Boomer]

Mine actually measured .310 which is what Cz claims it is. I was able to shoot .308 to .311 bullets accurately but finally settled on sierra .311 125 gr game king as my bullet of choice. It held together well whereas the .310 hornady and remington offerings were very explosive.

The .311 bore diameter I quoted came directly from CZ's web page. My experience shooting .308 bullets in a .310 bore came from the time I spent with a Mosin Nagant carbine. I was never able to get my handloads using .308 bullets to shoot as well as surplus military 7.62X54R. All that occurred 25 years ago, and those records are long gone now, but I was pretty much left with the opinion that it was unlikely that a .308 bullet would obturate sufficiently to shoot with a bullet of the correct diameter.