Re: 7mm Rem Mag load for Elk size game at 700 yards.
I have used the 162 a-max on fallow and bull tahr at 630 yds, 3068 fps, both shots gave full penetration. The fallow was a spiker DRT, the tahr ran down hill a bit, the a-max went through the back of the ribcage, no major bones hit.
I have used the 168 berger at 590 and 442 yds on red deer. At 590 yds complete penetration but required a head shot because of the shot angle. The bullet hit behind the shoulder, angled forward sliding along the ribcage, then went above the spine and exited front of the opposite shoulder.
At 442 DRT, but shot did not exit.
Personally on deer use the 162 a-max, it is way cheaper than the Berger (at least in NZ), and gives excellent performance on deer at long range.
I use the 160 accubond inside 300 yds and the a-max/berger beyond 300 yds.
For sambar I am guessing, gutfeeling is either 180 berger or 175 sierra matchking.