Im starting load workup for my new Redhawk in 45LC using 300gn XTP Mags (I have a bunch for my muzzleloader load). I found load data from Handloader #213 which is a "best load" of AA#9 at 21.5gns through a Ruger Blackhawk. Obviously Im going to start low and work up but doesn't that seem dangerously high? I seated a bullet and there is some gap between the powder and the bullet when seated, I estimate 90-95% load density. Brass is virgin Starline and LR Primers. Im also going to try IMR-4227 and AA#7 so if anyone has any experience with them I would appreciate any input as well.