R26 would be best for the 7Rem Mag. and R16 but in the 7 mag it would be better for the lighter bullets. 7977 looks good too. I would be sure to pick a temperature stable powder and anti copper agents would be nice too, almost all the newer powders have this. IMR 4955 is another but not the best for heavies in the 7 mag. Problem is availability all the popular choices are in short supply it seems.R23 could be the best all around for those calibers.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli