I have used 168 grain TTSX in a 30-06 in my T/C Encore for caribou and everything I took with a rifle in Namibia with great success. Most notably to me was a zebra quartering to me at 120 or so yards that broke the front leg and still travelled intact completely to the far side hide. I still have the bullet, it's a perfect mushroom. The zebra only went a few yards. I went with 150 grain TTSX in my Ruger #1 in 30-06 and last year it dropped a decent sized caribou bull in its tracks with a complete pass through. I've worked up a load for a friend's 300 Win Mag Mag with 150 grain TTSX primarily for caribou, that gets a hair under MOA accuracy. I have no doubt it will drop a moose if he can get one in his sights, which is a bit of a running joke with us.This is interesting, as I’m just going to start cooking up a load for a 300H&H. Also, I picked up a box of 168 and 180 ttsx to test in two 30-06’s I bought and haven’t really had time to try out!
I was considering 200 or 180 for moose/elk, but maybe dropping down is in order.