About pulling the bullet and weighting the powder, you don't want to do that! Hornady has powders not avaliable to the public that they load ammunition with. Find a load in your manual that comes fairly close and work with it.
I stopped reading your post at the duplicating the powder part. W Unless the 8th edition is a specality cartridge, I doubt very much they'd leave out the 270 and 30-06!
Looking at the powder your using I'd say it's a bit to fast. Try the 4831's, R-22 and maybe W760/.H414. You don't really need a magnum primer but they used to be recommended for ball powders W760 and H414. Magnum primers are also used to ignite large cases of slow powders, you don't have that. Primers can make a difference though but they won't turn a 1 1/2" rifle into a 1/2" rifle!
Last edited by Don Fischer; 10-06-2011 at 02:49 PM.