Stick with Barnes. Dead is dead. I worked for Barnes in the early 2000's and shot their number 3 reloading manual data. The Ttsx are a better choice. Barnes doesn't design their bullets for postal loss like hammer and cutting edge. Back when I was shooting for them the bullets that Federal loaded in their Premium ammo would retain 100% grain weight at 25 yards at full muzzle velocity. Bone is hard on elk, and shot angle affects how the petals strike it. I shot my only bull elk in Utah with a 375 Why and a 270gr TSX at 80 yds. Bull took that bullet at 2700fps and at 80yds. Hit it with the equivalent of a VW Bettle through both front shoulders and he didn't flinch. Walked 30yds and stood there for a couple minutes then piled up. Your situation speaks to the toughness of the animal. Deer hit in the heart will run quite a distance even though the heat can't function. Barnes have a better BC than other monolithic bullets. I've always found it interesting that people are flocking to bullets designed to do what they complained the Barnes bullets did in the early years, losing their petals. You will have the same pencil exits and internal damage with the otollowinher bullets you listed. Try the TTSX and stick to 165 or 168 gr. I hope this helps