The chamber on my CSC is tight. Some ammo starts to hang up after a time, some, like current Velociters won’t seat properly, so may misfire as the firing pin rams the round home. No whoopsies yet, and I don’t push the envelope, just switch ammo when the trouble first arises. Just part of the price for better accuracy. I’d stick with a standard chamber if maximum reliability was important, or use a bolt gun.
