I use the 150 gr ttsx in my .308. It is loaded with 44 grains of IMR 4895. I cannot give you any velocity or ballistic particulars on the load, but it is a very accurate load in my rifle. I have used the 150 grain ttsx bullets in my 308 on whitetail, hogs, elk, red stag, wildebeest, gemsbok, leopard, waterbuck, zebra, bushbuck, and impala. Red stag and wildebeest being the only animals that were given a follow up shot.
Alaska, sorry I can’t help you with the 308, but I’ve had pretty good luck using the online accuracy loads on the Barnes website. You might try them. They have worked pretty well in my 30-06, 300 WM and 375 H&H.
Best of luck!
Mule deer and Colorado elk seasons almost done! Hunters driving farm roads, looking for racks, their PH driving them along, I ask that you not pull into my drive. The buck behind me, on the boundary line of the GMU somehow knows. The hunter laughs, I would invite you in to see my Searcy rifles but social distancing prevails, darkness arrives and the buck slides away into secret tree grove...