Well, there are actually several numbers, because BC varies with velocity. Litz's book breaks them down into velocity categories.
I quoted the highest numbers in the book, for velocities over 3000 fps, which for overall use are optimistic. Gasman quoted the BC's for the BC's for velocities from 3000 down to 1500 fps, which for hunting use are probably a little too low, since many bullets won't open consistently at 1500. The LRX bullets are designed to expand at lower impact velocities than TTSX's, but 1500 would still be marginal.
For hunting purposes I average the listed BC's from 3000+ to 2000 fps, or 3000-2000, depending on the cartridge. For 3000+ down to 2000, the 127's average BC's are .476 (G1) and .232 (G7). For 3000 to 2000, they're .470 and .230.
