Prior to 2016 - when 2230 and 2460 were "reborn", I tested those powders along with H335 and H4895 (plus a few others). 2230 was significantly faster than H335 which was very close to 2460. Two grains more of 2460 gave nearly identical results of H335 from my tests shooting the 500gr Hornady in a CZ 550 (25" barrel).
My current understanding is that both the reformulated 2230 and 2460 are now made in the same plant in St Marks, Fl as H335. It's the only plant in N.A. that makes ball powders. I know as a fact, that for several years H335 made in the St Marks plant is significantly different from the "old" H335 that some complained about as "dirty" and not temp resistant. See Hornady on that powder for both the .458 Win and Lott.
I've used H335 in several .45-70s and in the CZ 550 in .458, and now my Ruger #1H, and it is, if not the best, then certainly one of the best! Not dirty nor unstable with changes in temps from summer to winter.
Since TAC and H335 have near identical burn rates, and since TAC has proven its worth in today's .35 Whelen, I intend to give H335 a try in my new .35 Whelen. It's burn rate is similar to H4895, which is stellar in both the .35 Whelen and .458 Win Mag.
And, Sir Jerry, I, too, am greatly interested in your African hunt, wishing you God's best and great success!
