I don't want to even say how old I was and after reading hunting forums like this one before I realized that maybe core-lokts maybe weren't the BEST thing going. They are/were just what everybody shot, the green and yellow box of boolits sitting on the dash of every truck in Eureka! They have killed piles of elk over the years, but there are certainly better options.
Yeah, growing up that's what ammo was. I wasn't even aware there was options.
I had some weird stuff happen with them that hasn't happened again since I switched to bonded bullets. They'll definitely work, but there's no reason to limit yourself when there's such better options on the market.