IMO you couldn't choose a better varmint round. As for bullets try a bunch between 40 and 55 grains with either hollow points or polymer tips and use the one your rifle shoots the best. Ruger makes a good, durable product, my only concern with ruger is you might get one that isn't super acurate (doesn't mean it won't work for hunting), Weatherby, Tikka, Remington and Savage are more likely to be tack drivers right out of the box.