I shoot Grim Reapers and there is absolutely no need to practice with them. There's not a significant closed profile difference in the Rage and the Grim Reaper. My bow is tuned and I practice with field tips. When it's time to hunt, I screw on the Reapers and check them on a spinner to make sure there is no wobble at all and then go hunting. If I shot Rage broadheads, I would do the same thing.