View Full Version : polygon barrel tolerance?

May 23, 2009, 06:02 PM
Hope I'm asking this in the right forum. I have a CZ-82 9x18 that has the polygon rifling. If I drop a .356 bullet down the bore it falls right through, a .357 dia. bullet has a small amount of drag but can be easily pushed through. I know I can't drop a .356 bullet down the barrel of a 9 mm pistol so is this normal for a polygon barrel or is this thing just shot out? The pistol has a 1983 manufacture date on it and it looks very good overall.

Bill DeShivs
May 23, 2009, 06:39 PM
8X18 uses a larger bore diameter.

May 23, 2009, 11:44 PM
9X18mm Makarov uses a .363" bullet instead of a .355" bullet common to most other 9mm pistols.