I am using R26 and the 95BT and it has been excellent. Once you use up your current powders I would go to R23, R16, 4451 or some of the newer temperature stable powders. I would also see which ones seem to be more consistently available and/or buy in larger lots. I am not sure if I would call the 243 an inherently accurate cartridge but it has been very easy for me to find a good load. I think this is partly due to popularity and the abundance of good published loads.

"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