Originally Posted by Hoop
24 TAC + 77 @ 2.245 is closest I got in LC brass.
You are much better off picking a more temp stable and accurate powder like varget H4895 etc and developing a good load than trying to clone the mythic Mk262.
One thing about TAC... It's NOT very temperature-sensitive according to Ramshot's ballistics people, who say they've tested it at -40F and +140F, and the deviation between those 2 extremes is less than 3%.