I haven't been reloading long, but somehow I missed the discussion on crimping. I've been firing my .40 reloads for some time using unique with no problems. I recently bought a new powder (HS6), as my old supply is running low, and while doing load research I noticed the discussions on crimping and keyholes... let me cut to the chase, am I going to kill my gun? I don't want to do that, I'm not looking for super accurate loads, I never shoot further than 15 yards (mainly cause I suck), but I like reusing my brass. So what should I do?