I've seen 180 Gamekings explode and fail to penetrate more than 3" on mule deer 3". Two bullets from the same rifle on the same deer. The first was a chest shot, forward of the shoulder that did not penetrate the chest cavity at about 250 to 300 yds. The second shot was about 50 or 60 yds and was a high spine shot (not where he was aiming but that's where the bullet went) it blew-up and distroyed the near backstrap and did manage to break the spine but there was no damage on the far side of the deer.
I've been using 115 Ballistic Tips for years in my 25-06 and don't know if I've ever recovered a bullet because they always pass through at distances from 40 to 300 yds. Mostly used on deer but also one nice 350 lb black bear.
I'll buy off on any Accubond, or Swift Scirocco, or Barnes-X, etc. recommendation. Elk are tough and I've seen several absorb 3 or 4 premium bullets before hitting the dirt, but I wouldn't be so fast to condemn the Ballistic Tips or to praise the Gamekings.
If you're worried about it go with premium bullets.
My $0.02.