I would take the Shockwaves. Get one of each the 200 & 300 and then hit the range one last time. Sight dead on at 100 yards. Then when you get a good group with 2 or 3 pellets, move out to the 150 yard target. There should be around a 4" drop. I always figured I would aim high top of the shoulder and let the bullet do the rest. Also from what I have been reading about the killing power of these 200 grains, if I had open shooting distance to do, that might be a real good choice.

I just don't trust the powerbelts for long distance. But I have never killed a deer with a powerbelt or shot them long distance. Where I hunt I do not have to shoot long distance...

Good luck out there. I am sure if your rifle shoots those Shockwaves and you can place the shot, they will not let you down.