I have. Compare? well, it's in the neighborhood of 350-400 fps faster, basically a long range express rifle. One PH I read about likes it because he can whack a wounded elephant by a client at 200 plus yards and still put him down. VERY EXPENSIVE ammo and recoil is pretty sporty. Also, magazine capacity is two rounds (plus one in the chamber). I prefer the 458 Winchester.

A good principle to guide me through life: “This is all I have come to expect, standard lackluster performance. Trust nothing, believe no one and realize it will only get worse…”