TAC, Varget, RL-15, and IMR8208.
Varget works extremely well with the 77 SMK's but the velocity isn't quite as good.
TAC is/has been virtually unobtainable for a long time, so I've scratched it...........
Add RL-15 which performs almost identically to Varget but usually with a little higher velocity, AR Comp, MR 2000 & H4895.
I usually stop with IMR8208 at the 69 gr bullet level; it's accuracy is always very good but the pressure seems to get too high before the velocity equals the others with the heavier bullets.
MM
