I'm a beginner! I'm reloading .243 Win's and after I figure this out a little more I would like to move on to other calibers. I'm having a hard time with crimping. Do I need to crimp? Every so often I crimp a case too much and ruin it. I was talking to a guy that reloads .223's and he mentioned that he doesn't crimp at all - so it got me wondering if I need to.