Yup, just like I said in my post, it all depends on one's priorities. I think most would agree that the 338's will have significantly longer barrel life, but they also have a lot more recoil. The recoil in my 300 RUM is managable for me without a brake which is very important to me. I'm not sure how managable the 338 RUM would be without a brake. If the 338 RUM didn't kick any harder than the 300 RUM, or if I didn't care about brakes, it would be an easy choice.
As for the HAT 265's, the manufacturer claims tests showed bullet drops that exceeded .9 BC. When I ran the numbers, they showed 1.3 BC. On the other hand, Brian Litz tested the G1 BC to be .649, which if true, puts the HAT behind the SMK down range and way behind the GS. Frankly, I believe Brian Litz' testing results. There will be a shoot in Las Vegas soon to get some more field data on the HATs and other bullets.
On the 30 cal GS bullet at 3500 fps being a barrel burner, GS makes a very good case on their bullet promoting barrel life because of the design of their bullets and claim it's been proved in tests. In any case, performance usually comes with a cost. We can have our cake and maybe even the icing with it, but cake with icing and ice cream isn't likely