When I was guiding elk hunters, small rag horns and spikes were often taken. Removing hide, guts and head, I would take then to the locker plant where they were weighed. Between 225 and 250 pounds was the standard with the bones. Cows were usually @200 pounds so dressed out. With the head, hide, and guts I figured would double the weight. I have been around over 100 elk killed and have taken 38 myself so have a small amount of experience. One morning I shot an average sized older cow. Gutted it out and loaded it in my pickup. Before I got home I had to help a friend shoot a #800 (weighed) cow bison. Putting her in my truck along side the elk, the size difference dramatic. The elk looked like a fawn compared to the bison.