Im going to start fireforming new lapua brass for my new AI and looking for some load info. I have 75amaxs and wandering what powder and charge will be best for fireforming. I have onhand varget, benchmark, win 748, imr 4064, imr 4350, imr 4166, h322, re15 and vi140. Also is it possible to do load development while fireforming? Any help would be great.