Sinclair is having a sale on a number of powders. Don't know is any are in your group of preferred ones, but you might consider checking it out.
http://www.sinclairintl.com/reloading-components/powder/index.htm?r_o=-1&avs|Size_1=8+lb&s_o=MostPopular+%28Descending%29&avs|Special-Filters_1=Salezz1zzClearance&cm_mmc=Email-_-Spop-Email-_-lm_12518524-_-www_sinclairintl_com_relo_1&cm_lm=pneskow@sbcglobal.net&cm_mmca1=SI_Promotion_121715_Reloading%20%282%29&spMailingID=12518524&spUserID=NTgxNDczNjYyNTkS1&spJobID=643544434&spReportId=NjQzNTQ0NDM0S0
http://www.sinclairintl.com/reloading-components/powder/index.htm?r_o=-1&avs|Size_1=8+lb&s_o=MostPopular+%28Descending%29&avs|Special-Filters_1=Salezz1zzClearance&cm_mmc=Email-_-Spop-Email-_-lm_12518524-_-www_sinclairintl_com_relo_1&cm_lm=pneskow@sbcglobal.net&cm_mmca1=SI_Promotion_121715_Reloading%20%282%29&spMailingID=12518524&spUserID=NTgxNDczNjYyNTkS1&spJobID=643544434&spReportId=NjQzNTQ0NDM0S0