Okay so I put a couple hundred rounds through a CZ 75B Omega today and discovered that it always auto-forwards when a fully loaded magazine is inserted after slide lock. I pretty much always shoot 147gr flat point ammo, and the gun always failed to load the first round into the chamber when it auto-forwarded. I bought a box of 115gr ammo at the counter, and while the gun still auto-forwarded it would load the first round into the chamber with that ammo.
So my questions: is it common for CZ 75 pistols to auto-forward when reloading from slide lock? Also, any idea why it is failing to load the first round into the chamber when using the 147gr ammo? I suppose the contour of the bullet might have something to do with it, but I'm not using anything out of the ordinary -- just American Eagle 147gr. The pistol chambers the first round just fine when racking the slide and releasing by hand.