Hello, i just weighed my 585 Hubel its just over 5 kilo ,11 pound thought it was heavier than that ! need to get more accurate scales and check it again ,mine is not bad to shoot at 750gr s at 2000 fps the more you shoot it, the better you get used to it .Mine has been restocked with larger more surface area on the butt than standard Ruger N01, which i think is over looked ,and needed more on big bores ,look at the A Square rifles and their butt area .Contact Ed Hubel hes very helpful and good guy ! and enthusiastic about his round ,which i think is definately one of the better New rounds, unlike alot of others which are pointless IMO and achieve nothing new ,you can use this round in a single shot ,bolt action and probably even a double if you pushed enough $$$ in front of a double manufacturer,i think 12 pounds would be a good number !