I have a satin nickel CZ-83 chambered in 9x18. I've always fired FMJ's through it and have not had any problems. Well, I went to the range the other day. I took an assortment of 9x18 ammunition, including some of my own reloads. All of the FMJ's functioned fine, but I had about 20% of the HP's fail to feed. The HP's were actually getting stuck on the front top edge of the magazine just below the center of the bullets. The bullets would get slightly deformed by the front top edge of the magazine. My guess is that the FMJ's didn't have this problem because they are harder in the front and can't deform as easily. Is the solution to this problem to file the front top edge of the magazine at a 45deg angle? Or, should I do something else? Also, the screws holding the grips must have backed out some, because the grips loosened up. What would you suggest that I do to prevent this from happening? Finally, does anyone make a replacement recoil spring for this pistol? It's throwing the brass pretty far.