I have acquired a 6.5 Creedmore rifle on a Panda action, Jewell 2 oz. trigger, Robinson stock, Kavanaugh paint job for a very good price. I don't know the barrel twist offhand but I assume it's about a one in 9 or 10. I plan on using it for prairie dogs. I need a bullet recommendation. I am interested in accuracy, velocity and explosive expansion on these small varmints probably in the 400-700 yard range. I got brass, dies and a few bullets in a package deal. I am an experienced handloader but have never owned a 6.5. Any help you can offer would be appreciated. Thanks.