I recently purchased a BERSA 380 Thunder Semi Auto. It was being sold "as new," or barely used. I fired about 50 rounds through it and noticed with 3 or four rounds per clip that I was getting some sort of metal, powder, oil or other element in my face. It wasn't painful, just annoying. It felt like a few drops of salt being pounded into my face, esp. the chin area. I've experienced this with a .22 pistol as well. Does anyone know what this is? Maybe the answer is simple, and I'm dumb, but clue me in please! Thanks....