I have an open gun that was built by couple different people. It started life as a 38sc and is now a 9mm. I'm having a problem with tumbling bullets... Lots of tumbling bullets like 30 plus every match. The kkm barrel has 6,000 or less rounds through it. I've had the rifling and crown checked. Gunsmith said they both look like they're in excellent shape. I thought maybe it was the comp even though it checked out okay as well. So I bought a brand new Binary Eng CFD Titanium Compensator 3 Port and had it installed and had an aliment ream done. Same thing tumbling bullets. Gun shoots flawless never had a problem with function. Also runs flat and even when the bullets are tumbling they are doing so accurately. I'm just at a loss here and don't know what to do other than trying to change out the barrel again. Any info or things to try/check would be great.
Also I have tried friends ammo though it and it does the same thing.