I used Core-loks for years befor I went to noslers for elk,as stated befor the core-lok was made for the "06,I killed my first elk with 180 core-loks a big lead cow at about 70 yds,hit her right in the neck.

My dad still uses cor-loks and he has killed many,many elk with it,all were cows but hey he's never complained yet.

The only problem I have ever had with a core-lok was on a antelope yes,a antelope.The first antelope I ever killed,we crawled with in 80 yds of this antelope buck and I shot low and hit hm in the leg just below the chest,well he took off like a dart,running straight away.Well my dad told me to shoot again,well make a long story short the only shot I had was at the back of the head,well I shot and,well it was little low and you now that white pach on a goats butt,well it blew up and I mean when a core-lok hits bone at 100 yds on a antelope,well it came apart.
So I would try to avoid hitting bone if you could,I don't think they would hold up well.
BBJ