This issue has, no doubt, been covered before on this site, but I am new to it so I have a question. A friend of mine wants to get started reloading, so has been acquiring equipment and components. When I buy new brass, I size it and trim it, then prime it and load it. My friend, in his enthusiasm to get started just opened up the bag and primed them. How much of a problem to you think it might be for him to load them without sizing and trimming? Have you ever loaded them straight out of the bag. Should I suggest that he deprime and size them and start over? Will he have any problems reusing the primers if he does so?