HP's are way better killers with body shots on all manner of small game and varmints. Some HP's are way more effective than others too. Winchester Power Points and Remington Yellow Jackets for instance, have wide, deep HP's, expand fast and wide and are far better/quicker killers than the bulk pack Federals with the tiny, shallow HP's. On tougher game like squirrels or woodchucks, solids, whether standard or high velocity are poor/slow killers.