Personally, I would stay away from the 215 Gameking. A few of us experimented with that bullet at 338 Fed speeds and had trouble getting it to open. It's built for 338 WIn Mag speeds. If you really want to shoot 225 bullets, try the Interlock or the Speer Deepcurl.
I have found 200 Hot Cors and 200 Ballistic Silvertips to be the most accurate in mine.
