My boy has a heavy barrel setup, and it's one of the most accurate rifles in the house.

I've witnessed 300-400 yard shot's on Utah jackrabbits that were explosive as can be. I load the 32 grain variety in his rifle and we are amazed as to the accuracy and explosiveness. If it gets real windy we don't typically shoot past 200 much, we'll consider bringing something a little bigger out at that point.