Since we are talking about the FEG PA-63 I will repost my message of about a year ago: I ringed the barrel of my FEG PA-63 (makarov). I keeped the gun in my car (lots of thermal cycles in Florida) for more than a year. When I went to the range I used spare mags with target ammo. One day I decided to use the good stuff (CorBon) that was in the gun. The first shot was kind of funny but made a hole in the paper so I went for the second. Loud bang, really hurt and gun almost fell out of my hand. On checking the ammo left in clip, I noticed the hollow points were somewhat deformed (no longer round holes) and some rounds were actually further depressed into the shell. Not exactly sure what caused the damage to the ammo. Needless to say, I have discontinued the practice of using that type of ammo in vehicle (note to self: don't use so much gun oil). The barrel was ringed just where the slide goes back to its full action, so basiclly the gun was functional but I could not get the slide back far enough to remove it. I fixed the gun by carefully cutting the barrel off twice. Once to get the slide off and then cutting again to cut the bulge off. Then I drove out the stub of the barrel and replaced the barrel. Gun now works fine. I now use military sealed ball ammo in that gun and have not had any further problems. Tough little gun. By the way it is still one of my carry guns. I use a fanny pack (it's Florida, it's still in the low 90's, not a lot of clothes to hide it under and I just look like a tourist) made by StelthPack.