I am thinking of trying AA2015 in my 45-70's. My preferred bullet is a 400 gr Speer JFP, but cast 405 gn RCBS FP and 405 gn Semi Spitzer both with gas checks and both weighing around 420 gn. I would like to try the powder in a 1895LTD Marlin and a 14" TC Contender, so will AA2015 work for light loads? Will it need a wad? I am currently using IMR 3031, IMR 4198 and AA5744. I have been told that AA5744 is best with heavy loads in the 45-70 and IMR 4198 is best with lighter bullets.