Follow up...
Took some time to do some shooting while out elk scouting. Shot 3X 4 shot groups at 100 yards with the new bullet design before I settled in for some longer range work on the gong. Same load, with OAL determined and adjusted for the new bullet.
Group 1 @ .62
Group 2 @ .68
Group 3 @ .73
Very pleasantly surprised. Was obviously concerned about having to work up new loads, but not needed. Shoot better than the old TSX's outta the 77, with which I was maintaining right at 1".
Looks like I'll be stocking up on these before they possibly change the design again.