What kind of thermometer are you using to measure the temperature of the wax? Here's my story with 464.
I was using a regular candy thermometer when I started making candles, and was having similar issues with hot throw. Turns out it wasn't giving me accurate readings, either because I was measuring the temperature of the bottom of my pot where the thermometer was resting (and thus adding my FO at too low a temp) or because it just wasn't an accurate thermometer. Switched to one of the infrared thermometers and I've gotten MUCH better results since then.