It doesn't bulk up much but you should find it's excellent in all kinds of applications where you'd normally use Unique - i.e. middlin' to middlin' warm loads.
I've used it in the 9mm with 124 gr jacketed bullets for standard full power loads, the .38 Spl. at standard velocity and just getting into +P velocities, the .357 Mag at 1000-1100 fps, .44 Special and .45 Colt. It provides the best accuracy across all of those of anything I've ever tried. IOW, one powder or another might prove a bit more accurate in one particular caliber/bullet combo but nothing shoots as consistently well across all calibers like TB.
As you've noted, it is very fine grained and meters like water, given any kind of uniformity in working a powder measure it will give extremely consistent charge weights.
Bottom line is that I love this stuff and use it wherever possible.
Fwiw, the best loads going up the caliber scale turned out to be 2 grains apart. Nothing to conclude here but it was an interesting happenstance.
.38 Spl with 158 LSWC - 5 grains
.357 with 158 LSWC - 7 grains
.44 Special with 200 RNFP - 9 grains
.45 Colt with 250 LSWC - 11 grains.
