My vote's also for the Predator if it turns out your rifle likes them. They certainly do a number on tree rats, turkeys (ooops, honest, I thought it was a crow!) rear view mirrors...Nope, that was Jeff, etc. lol
Remember though, POI on the target will most certainly be different then that of the pellet you normally use for day-to-day shooting. After your rifle is seasoned and targeted with whichever pellet you choose, just shoot some Predators and see where they hit...adjust from there, but keep track of how many clicks for elevation and windage you change. Revert back to your previous settings once you finish with the Predators....