Fort the past two months I have been having a blast doing some load development for several different rifles. its been amazing to me what some of these guns are capable of. just varying powder charges. The next gun i want to do is my Ar-15. This is the only caliber I have that I have never reloaded for. I have one set of redding competion dies for my 338 edge (should be picking up from shawn soon) that I havent used yet. the rest are mostly rcbs dies. since I will be starting from scratch: which dies do you recomend? are carbide available, if so will it allow me to load progressivly? I am using a dillon 550. for a 1-9 twist, which bullet should i start with. i want to try the smk's,but which would work better for this twist? 53 or 69 grains. which powder should i start with. I am hoping Reloader 15 will work? locally, I can get the alliant powders, but everything else is impossible. primer recomendation? I have been searching for an hour or so, but could not find all the info i was looking for. thanks alot guys, you all have helped me out a ton already!