Originally Posted by DUKFVR
... It is DEADLY accurate with the Barnes 165 gr factory loadings.
I think you said it yourself... sounds like you've got a whole lot of confidence in the Accuracy of the 165 TTSX. Accuracy and confidence in that accuracy are huge.
As long as you're using a premium bullet, if you put that bullet in the right place the chances of a long track are pretty slim. You'll find all of us on this sight split hairs regarding everything technical, and there will always be guys who have had failures with one of the premium bullets. When that happens they lose confidence in that particular bullet and switch to another. I've done it myself. It's all part of the fun.
With an all copper Barnes I think the 165 will work fine well beyond 400 yards for elk, and you'll get good velocity and a nice flat trajectory out to 400 yards. Is the 180 better for elk? Maybe. I would hunt with whatever you feel is more accurate. But you would have fun trying to figure out which one shoots better!