I posted here the other day about the pros and cons of fire-forming 100 Lapua cases before starting my load development for my 6.5 CM Ruger American Predator. I decided to go ahead and fire-form these 100 cases. I want to load them up with some extra powder that I have no use for. I have some H1000, R22 and R23 from my 7 mag that I don't shoot anymore. So these three powders don't publish load data for the 6.5 CM. So does that mean its not doable...or is it dangerous to use those powders? I understand if those powders aren't ideal for the 6.5...but I really just need it to go bang and fire-form the cases. I'll probably set up some 100-200 yard steel targets just to entertain myself. So if it is doable, how would I go about finding a safe charge? I did a quick search just now and couldn't find anything. I'm going to use Barnes Match Burner 145 gr Open Tip Match BT bullets for this fire-forming....they are the only bullets I could find on Midway.