Anyone use Slick trick magnums?

[Offshore Custom Tackle]

Looking to try the Slick trick magnum 100gr. 4 blade broad heads.
Anyone have any experience?

[bluecollar$]

I know a guy who used them on elk and said the penatration on them is bad. He is a guide and has killed many elk but specifically said not to use them. Take it for what its worth, I have never used them, but they look mean. I've never been a fan of 4 blade heads.