I shot my elk last year with a 160gr accubond out of my 7mm Rem Mag and was happy with the results. Didn't have perfect shot placement, but it still got the job done.

Another bullet you might check out is the E-tip. It has 95%+ weight retention and almost the same ballistics.

Here's the E-Tip I recovered out of my mule deer buck this year. I shot him dead on in the chest with him facing me at 50 yards out of the 7mm Mag.



It was a 150gr bullet.