First off congrats on the bersa, get the cc or the regular? I have both bersas and they do require a break-in period. Also the bersas are prone to limp-wristing. I had a few ftfs when I first started learning the bersas. Now, I have no trouble whatsoever with either of them. The bersa is a great gun, never had any problem with the finish, never had any mechanical problems that weren't user error, such as limp-wristing. Mags are a pain to find and are costly when you do find them, but otherwise no complaints. I suggest paying attention to limp-wristing, and see if that corrects the problem, also give it a small break-in perion, our took about 200 rounds each. I know experienced shooters don't limp-wrist, but I was an experienced shooter when I fist got the bersas, and sure enough my ccw instructor caught me limp-wristing, pointed it out to me, and I had no problems afterwards. I had used my bersa for class.
P.S. I use powerballs in my bersas, and have been pretty happy with them.